Produce and maintain jigs and templates

    CITY AND GUILDS OF LONDON INSTITUTE
    Vocational

    This subtopic focuses on the design, production, and ongoing maintenance of jigs and templates, which are essential for ensuring consistent accuracy, repeatability, and efficiency in furniture, furnishings, and interiors manufacturing. Learners must demonstrate the ability to interpret specifications, select suitable materials, and apply precision marking and fabrication techniques to create functional production aids. Practical application extends to verifying dimensional accuracy, modifying jigs to accommodate design changes, and implementing systematic maintenance routines to prolong usability and maintain quality standards.

    20
    Learning Outcomes
    28
    Assessment Guidance
    33
    Key Skills
    16
    Key Terms
    36
    Assessment Criteria

    Assessment criteria

    City & Guilds Level 3 NVQ Diploma in Design in the Furniture, Furnishings and Interiors Industry
    City & Guilds Level 3 NVQ Diploma in Furniture Making
    City & Guilds Level 3 NVQ Diploma in Finishing Furniture
    City & Guilds Level 3 NVQ Diploma in Upholstery and Soft Furnishings
    City & Guilds Level 3 NVQ Diploma in Fitted Furniture and Interiors
    City & Guilds Level 3 NVQ Diploma in Supervision in the Furniture, Furnishings and Interiors Industry
    City & Guilds Level 3 NVQ Diploma in Restoring Furniture

    Quick Revision Summary (Key Takeaway)

    The City & Guilds Level 3 NVQ Diploma in Upholstery and Soft Furnishings is an advanced vocational qualification for skilled upholsterers, covering traditional and modern techniques, furniture restoration, and soft furnishing production. It assesses competency in the workplace through practical evidence and knowledge tests, preparing learners for supervisory roles or self-employment in the upholstery industry.

    Topic Overview

    The City & Guilds Level 3 NVQ Diploma in Upholstery and Soft Furnishings is an advanced qualification designed for individuals who are already working in the upholstery industry or have completed a Level 2 qualification. It focuses on developing high-level practical skills and knowledge required for complex upholstery tasks, such as traditional upholstery techniques, furniture restoration, and producing bespoke soft furnishings. The qualification is assessed through a combination of practical observations, written evidence, and professional discussions, ensuring that learners can demonstrate competence in real-world settings.

    This diploma is essential for those aiming to progress into supervisory roles, start their own upholstery business, or specialise in high-end restoration work. It covers a wide range of units, including preparing and cutting upholstery materials, applying traditional upholstery techniques, and creating soft furnishings like curtains, blinds, and cushions. The course also emphasises health and safety regulations, client communication, and quality control, which are critical for professional practice.

    In the wider context of Manufacturing & Engineering, this qualification bridges the gap between traditional craftsmanship and modern manufacturing processes. It equips learners with the skills to work with both hand tools and industrial machinery, and to understand the properties of various materials, from natural fibres to synthetic foams. By achieving this diploma, students demonstrate a high level of expertise that is recognised across the UK, opening doors to advanced career opportunities and further education.

    Key Concepts

    Core ideas you must understand for this topic

    • →Traditional upholstery techniques: using coil springs, webbing, hessian, and stuffing materials like horsehair or coir to create durable, comfortable furniture.
    • →Fabric selection and cutting: understanding fabric grain, pattern matching, and calculating yardage to minimise waste and ensure a professional finish.
    • →Soft furnishing construction: making curtains, blinds, cushions, and pelmets, including measuring, cutting, and sewing with precision.
    • →Frame repair and restoration: assessing and repairing wooden frames, including joint reinforcement and finishing techniques.
    • →Health and safety: using tools and equipment safely, handling hazardous materials (e.g., adhesives, foam), and following COSHH regulations.

    Learning Objectives

    What you need to know and understand

    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Interpret detailed working drawings to produce a functional jig or template.
    • Select appropriate materials and fixings based on production volume and required durability.
    • Apply safe working practices when using hand tools and woodworking machinery.
    • Accurately mark out and cut components to achieve the specified dimensions and angles.
    • Assemble and test a jig or template to verify repeatability within agreed tolerances.
    • Diagnose causes of inaccuracy and undertake corrective maintenance on existing jigs and templates.
    • Document maintenance schedules and modifications to support continuous improvement.
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Interpret design briefs and technical drawings to determine jig specifications.
    • Select appropriate materials for jig construction considering cost, durability, and application.
    • Apply marking out techniques to transfer design dimensions accurately onto template materials.
    • Safely operate woodworking and metalworking machinery to cut and shape jig components.
    • Assemble and finish jigs to meet required tolerances and functional requirements.
    • Test completed jigs and templates against original specifications to verify accuracy.
    • Develop and implement a scheduled maintenance plan for jigs to prevent wear-related inaccuracies.
    • Document all production and maintenance activities in accordance with organisational procedures.
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates

    Assessment Criteria

    Key criteria assessors look for in your portfolio

    • Award credit for demonstrating accurate interpretation of technical drawings or specifications to determine jig/template dimensions and required functionality.
    • Provide evidence of selecting appropriate materials and construction methods based on the jig's intended use (e.g., durability, precision, number of production cycles).
    • Show systematic checking of completed jigs/templates against original specifications using calibrated measuring equipment and recording any deviations.
    • Evidence must include performing routine maintenance checks, identifying signs of wear or damage, and taking corrective action to restore accuracy.
    • Demonstrate safe and correct storage of jigs and templates to prevent distortion or damage, with clear labeling for future retrieval.
    • Award credit for demonstrating accurate marking out from engineering drawings or specifications.
    • Check that the constructed jig/template meets the design intent and operates safely.
    • Evidence of following safe operating procedures and maintaining a tidy work area.
    • Award credit for effectively identifying wear, damage, or misalignment and proposing suitable repairs.
    • Expect clear records of maintenance work including date, actions taken, and any recalibration.
    • Award credit for clearly interpreting technical drawings or specifications to produce a jig or template that matches required dimensions and profiles.
    • Evidence must show the correct selection and safe use of tools and materials (e.g., MDF, plywood, fastenings) appropriate to the task brief.
    • For maintenance, look for evidence of thorough inspection routines, identification of wear or damage, and corrective actions such as re-facing, re-sizing, or replacement.
    • Assessors should confirm that the learner records all production and maintenance activities accurately, including any modifications and final dimensional checks.
    • Award credit for clear evidence of interpreting design specifications correctly.
    • Look for appropriate selection of materials with justification based on the intended use of the jig.
    • Expect demonstration of precise marking out and measurement techniques, such as using a combination square and marking knife.
    • Assess safe and competent use of machinery, including appropriate PPE and machine settings.
    • Check that the finished jig conforms to dimensional tolerances stated in the specification.
    • Require a maintenance log or schedule as evidence of ongoing maintenance activities.
    • Verify that any adjustments or repairs are documented and carried out in a safe manner.
    • Award credit for accurate interpretation of technical drawings and specifications to determine jig/template dimensions and features.
    • Evidence of selecting materials and components that are suitable for the intended repetitive use, considering durability and stability.
    • Demonstrate consistent use of safe working practices and correct use of hand tools, power tools, or CNC equipment to produce the jig/template to required tolerances.
    • Show a systematic approach to jig/template maintenance, including cleaning, inspection for wear or damage, and accurate storage records.
    • Award credit for demonstrating a thorough risk assessment and safe system of work prior to jig or template production, including correct use of PPE and machinery.
    • Credit should be given when the candidate shows accurate interpretation of technical drawings, including dimensions, tolerances, and material specifications, and explains how these are translated into the jig/template design.
    • Look for evidence of selecting appropriate materials and construction methods that ensure durability, repeatability, and ease of use for the intended manufacturing process.
    • Award marks when the candidate demonstrates systematic inspection and maintenance routines, including checking for wear, distortion, and damage, and explains corrective actions such as recalibration or repair.
    • Credit clear documentation of jig/template specifications, maintenance logs, and version control to support traceability and continuous improvement.
    • Award credit for demonstrating the ability to interpret working drawings or restoration requirements to produce a jig that matches the intended profile or joint precisely.
    • Credit given for selecting appropriate materials for jigs and templates (e.g., birch plywood for stability, MDF for smooth edges) based on durability, cost, and intended use.
    • Expect evidence of verifying jig accuracy using precision instruments such as vernier calipers, combination squares, and feeler gauges, with adjustments made where necessary.
    • Marks awarded for following a documented maintenance routine, including cleaning, lubrication, inspection for wear, and safe storage of jigs to prevent distortion or damage.
    • Credit for identifying defects or wear in existing jigs and carrying out repairs or modifications effectively, with justification of the chosen method.
    • Assessors expect to see adherence to health and safety practices during the production and maintenance of jigs, including correct use of guards, dust extraction, and personal protective equipment.

    Assessment Guidance

    Guidance for achieving higher grades

    • 💡Always cross-reference your jig/template design decisions back to the original manufacturing specifications and justify material choices in your evidence.
    • 💡Build a portfolio of evidence that includes date-stamped photographs showing key stages: marking out, construction, inspection, and maintenance activities with corresponding calibration records of measuring tools.
    • 💡In written responses, use correct terminology such as 'datum face', 'tolerance stack-up', and 'witness mark' to demonstrate depth of understanding and vocational competence.
    • 💡Always refer back to the original design specification when assessing the condition of a jig or template.
    • 💡Maintain a detailed logbook of all maintenance activities to provide verifiable evidence for assessment.
    • 💡Practice safe storage and handling to prevent accidental damage and prolong service life.
    • 💡Carry out a trial run with scrap material before relying on a jig for production tasks.
    • 💡For portfolio evidence, include annotated photographs showing each step of jig/template construction, with measurements highlighted.
    • 💡Demonstrate maintenance competence by documenting a before-and-after scenario, detailing the inspection findings and the specific corrective measures taken.
    • 💡When describing ‘know how’, explain why template materials are chosen (e.g., MDF for stability) and how environmental factors like humidity can affect accuracy.
    • 💡Always cross-reference your work to health and safety regulations, such as dust extraction and safe storage of sharp templates, to meet NVQ criteria.
    • 💡For your portfolio, include photographs of every stage of jig production, from initial design sketch to final testing.
    • 💡Supplement your evidence with witness testimonies from supervisors who observe your jig production and maintenance tasks.
    • 💡Keep detailed records of any calculations and material quantity lists to demonstrate your planning and resource management.
    • 💡When demonstrating maintenance, show before and after examples of jigs that have been serviced, highlighting any adjustments made.
    • 💡When documenting your work, include annotated photographs or sketches that clearly show how the jig locates and guides the tool or workpiece.
    • 💡Prepare a maintenance log that records date, condition checks, repairs, and calibration checks to evidence proactive upkeep.
    • 💡Link your choice of jig material and design directly to the production quantity and environment—explain why it is fit for purpose.
    • 💡Always structure your portfolio evidence around a clear cycle: planning, production, inspection, and maintenance, with supporting photos and witness statements.
    • 💡Include examples of both hand-made and CNC-produced jigs/templates, highlighting how you supervised the process and ensured quality control at each stage.
    • 💡Reference relevant industry standards and organisational procedures directly in your written accounts to demonstrate underpinning knowledge.
    • 💡When describing maintenance, emphasise the use of monitoring schedules and explain the difference between preventive and corrective actions.
    • 💡In observed assessments, begin by thoroughly reviewing the job specification or restoration brief, and verbally confirm your understanding with the assessor before constructing any jig.
    • 💡Document the design, construction, and maintenance processes with clear photographs and written notes as part of your portfolio, demonstrating underpinning knowledge and reflective practice.
    • 💡When explaining jig production, explicitly link your material choice and joining methods to the need for repeatability and longevity—this showcases analytical thinking.
    • 💡Practise using a variety of workshop equipment (e.g., routers, band saws) safely and accurately to create jigs, as assessors will grade your competence in both process and outcome.
    • 💡In knowledge-based assessments, reference relevant units or standards, such as those for tolerances or material properties, to show a holistic grasp of the subject.
    • 💡Present your maintained jigs for inspection, and be prepared to discuss the frequency of checks and any corrective actions taken, reinforcing your commitment to professional standards.
    • 💡Always use correct technical terminology in your answers, such as 'webbing', 'hessian', 'scrim', 'stuffing', and 'piping'. This demonstrates depth of knowledge and earns marks.
    • 💡In practical assessments, take photos and write detailed reflective accounts of your work, including any challenges faced and how you overcame them. This provides strong evidence for your portfolio.
    • 💡For written exams, read the question carefully and identify the command word (e.g., 'describe', 'explain', 'evaluate'). Tailor your answer to the level of detail required – 'describe' needs a straightforward account, while 'evaluate' requires a balanced discussion with a justified conclusion.

    Common Mistakes

    Common errors to avoid in your coursework

    • Confusing the roles of jigs and templates: using a jig to only trace a pattern when it should guide a tool, or vice versa, leading to inaccurate component production.
    • Failing to incorporate appropriate clearances or allowances for tooling access and material spring-back, resulting in ill-fitting or unusable production aids.
    • Using the original workpiece or a worn-out component as the sole reference for marking out, transferring inaccuracies into the new jig or template.
    • Neglecting to re-verify jig dimensions after maintenance or modification, assuming it remains accurate without formal checking.
    • Failing to secure workpieces properly when cutting or routing, leading to inaccurate parts.
    • Using substandard or inappropriate materials that result in premature wear or jig failure.
    • Neglecting to check measurements during assembly, causing misalignment and poor repeatability.
    • Over-tightening fixings, which can split timber or distort components.
    • Ignoring small amounts of wear until the jig produces out-of-specification items.
    • Failing to account for material thickness or cutter offset when constructing templates, leading to misaligned or oversize finished components.
    • Neglecting to secure jigs firmly during use, which can cause vibration, inaccuracies, and safety hazards.
    • Overlooking regular calibration checks, so that worn templates are not identified early, resulting in defective batches of furniture.
    • Using inappropriate materials that lack durability for repeated use, causing rapid deterioration and the need for frequent re-making.
    • Failing to account for material thickness when transferring dimensions, leading to inaccurate jigs.
    • Using the wrong type of material for the jig, such as materials that warp or wear quickly, compromising long-term accuracy.
    • Neglecting to check and tighten loose components after repeated use, causing production errors.
    • Overlooking health and safety requirements when using glue, paints, or finishes during jig construction.
    • Not labelling jigs and templates clearly, leading to mix-ups and incorrect usage on the production floor.
    • Confusing jigs with fixtures: learners may treat a jig as a static holding device rather than a guiding tool for cutting or shaping.
    • Neglecting thermal expansion or moisture-related distortion when choosing materials, leading to inaccuracies over time.
    • Omitting clear datum points and referencing surfaces, making the jig difficult to align consistently with workpieces.
    • Assuming that handmade jigs do not require the same precision as machined ones, resulting in cumulative errors in production.
    • Assuming that any sturdy material will suffice without considering the specific production stresses, leading to premature wear and inaccurate outputs.
    • Overlooking the need for location points or clamping systems to align the workpiece consistently, resulting in measurement drift and rejected components.
    • Failing to account for material expansion or contraction due to environmental factors, especially with wooden jigs in varying humidity.
    • Neglecting to train operators on the correct use and storage of jigs and templates, causing damage and loss of precision.
    • Mistaking a visual check for a full maintenance routine, ignoring calibrated measuring tools to verify jig accuracy.
    • Contaminating jig surfaces with adhesive squeeze-out or finishes, leading to inaccuracies and transfer marks on subsequent workpieces.
    • Failing to incorporate allowances for material thickness, blade kerf, or guide bush offsets when designing templates, resulting in parts that are undersized or misaligned.
    • Using materials prone to movement, such as solid timber, for long-term jigs without stabilisation, causing warping and loss of precision.
    • Neglecting to label and categorise stored jigs and templates, leading to confusion, wasted time, and accidental damage when retrieving them.
    • Overlooking the need for regular calibration of jigs against a master template or reference surface, allowing cumulative errors to go unnoticed.
    • Applying excessive force or incorrect clamping methods when using jigs, risking distortion of both the jig and the workpiece.
    • Misconception: All foam is the same. Correction: Foam density and firmness vary greatly; high-density foam is more durable and suitable for heavy use, while low-density foam is softer but less long-lasting.
    • Misconception: Pattern matching is optional for loose covers. Correction: Pattern matching is essential for a professional look, especially on large pieces like sofas; failing to match patterns can result in visible misalignment and customer dissatisfaction.
    • Misconception: Traditional upholstery is outdated and not used in modern industry. Correction: Traditional techniques are still valued for high-end restoration and bespoke furniture, and many modern pieces incorporate traditional methods for quality and authenticity.

    Revision Plan

    How to revise this topic in 1–2 weeks

    1. 1Week 1: Focus on traditional upholstery techniques. Review your notes on webbing, springing, and stuffing. Practice tying springs and creating edge rolls on a sample frame. Watch video demonstrations to reinforce the steps.
    2. 2Week 2: Concentrate on soft furnishings. Practice measuring and cutting fabric for curtains and cushions, including pattern matching. Sew sample items like a piped cushion cover and a simple curtain with headings.
    3. 3Week 3: Revise frame repair and restoration. Study different types of wood and joint construction. Practice repairing a loose joint using dowels or corner blocks. Take photos of your work for your portfolio.
    4. 4Week 4: Consolidate your knowledge by writing out key processes from memory, such as the steps for re-upholstering a drop-in seat. Use active recall flashcards for material properties and tool uses. Attempt past exam questions under timed conditions.

    Exam Question Types

    How this topic typically appears in the exam

    • 📋Multiple-choice questions on material properties and tool identification – revise the characteristics of different fabrics, foams, and woods.
    • 📋Short-answer questions requiring definitions of terms like 'webbing', 'piping', and 'gimp' – ensure you can give precise, one-sentence definitions.
    • 📋Extended writing questions (6-8 marks) asking you to describe a process, such as 'Explain how to upholster a dining chair seat' – structure your answer in clear steps with a logical sequence.
    • 📋Practical assessments where you are observed performing a task – practice your skills to ensure smooth, safe, and efficient working.

    Command Word Expectations (CITY AND GUILDS OF LONDON INSTITUTE)

    What examiners look for when using specific command words in this specification

    Describe

    Give a detailed account of a process, technique, or item. Include the main features, steps, and any relevant materials or tools. Do not give reasons or justifications unless asked.

    Explain

    Provide a clear account of why or how something happens, including causes, effects, and relationships. Use technical terms and give reasons for each step or choice.

    Evaluate

    Assess the strengths and weaknesses of a technique, material, or approach. Provide a balanced discussion, using evidence or examples, and conclude with a justified judgement.

    How Students Lose Marks (Examiner Pitfalls)

    Common mark loss traps and how to write 100% full-mark answers

    Pitfall: Students often confuse the properties of different filling materials, especially when selecting wadding for a specific furniture piece, leading to incorrect material choices in practical assessments.
    ❌ Weak Answer (Loses Marks):I would use polyester wadding because it is cheap and easy to find.
    ✅ 100% Model Answer (Full Marks):For a high-end traditional wingback chair, I would select a cotton or wool wadding for its breathability and natural feel, which provides a soft, luxurious finish and is compatible with the traditional upholstery techniques used. Polyester wadding is more suitable for modern, cost-effective pieces where a firmer, more resilient fill is required.
    Examiner Tip: Always justify material choices with reference to the furniture's style, intended use, and the properties of the material (e.g., breathability, resilience, cost).
    Pitfall: In written assessments, students often fail to describe the correct sequence of operations for re-upholstering a drop-in seat, missing out on key steps like webbing tensioning or edge rolling.
    ❌ Weak Answer (Loses Marks):First, remove the old cover, then put new foam on, and finally staple the new fabric on.
    ✅ 100% Model Answer (Full Marks):The correct sequence for re-upholstering a drop-in seat is: 1) Remove the old cover and padding, 2) Inspect and repair the frame if necessary, 3) Re-Web the base with jute webbing, ensuring even tension, 4) Fit a hessian cover over the webbing, 5) Apply a layer of foam or traditional stuffing (e.g., horsehair) and shape it, 6) Add a layer of wadding for a smooth profile, 7) Cut and fit the new top cover, pulling it taut and securing with tacks or staples, 8) Finish with a bottom cloth to protect the underside.
    Examiner Tip: Learn the standard industry sequence for common upholstery tasks and always mention health and safety checks (e.g., frame stability) at the start.

    Step-by-Step Worked Solutions

    Detailed solution breakdown for typical exam problems

    Question: A customer requests a new loose cover for a 3-seater sofa. The sofa measures 2.1 m wide, 0.9 m deep, and 0.8 m high. The fabric you have chosen has a usable width of 140 cm and costs £25 per metre. Calculate the total fabric required (in metres) and the total cost, assuming you need 2.5 times the length of the sofa for the cover, plus an extra 0.5 m for matching patterns. Show your working.

    1. 1.Step 1: Calculate the base fabric length: 2.1 m (sofa length) × 2.5 = 5.25 m.
    2. 2.Step 2: Add pattern matching allowance: 5.25 m + 0.5 m = 5.75 m.
    3. 3.Step 3: Calculate total cost: 5.75 m × £25/m = £143.75.
    Final Answer: Total fabric required is 5.75 metres, and the total cost is £143.75.

    Question: Describe the process of creating a piped cushion cover, including the materials and tools required, and explain how to ensure a professional finish.

    1. 1.Step 1: List materials and tools: fabric, piping cord, zipper (optional), sewing machine, piping foot, scissors, tape measure, iron.
    2. 2.Step 2: Cut fabric pieces: front and back panels to the desired size plus seam allowance, and bias strips for piping (cut at 45 degrees to the grain).
    3. 3.Step 3: Create piping: fold bias strip over the cord, stitch close to the cord using a piping foot.
    4. 4.Step 4: Attach piping to the front panel: align raw edges, stitch with a seam allowance, and clip corners to reduce bulk.
    5. 5.Step 5: Insert zipper or leave an opening, then sew front and back panels together, right sides facing, leaving an opening for turning.
    6. 6.Step 6: Turn right side out, insert cushion pad, and close the opening with a blind stitch.
    7. 7.Step 7: Press seams and piping for a crisp finish.
    Final Answer: The process involves cutting bias strips, covering piping cord, attaching it to the front panel, sewing the panels together with a zipper or opening, and finishing with pressing.

    Active Recall Memory Test

    Test your memory before revealing the key facts

    Frequently Asked Questions

    Common questions students ask about this topic

    Pass / Merit / Distinction Evidence Checklist

    How your portfolio evidence is graded for CITY AND GUILDS OF LONDON INSTITUTE Produce and maintain jigs and templates

    Every vocational unit is marked against named criteria rather than an exam percentage. Your tutor's brief lists the exact codes for this unit — here is what each band is asking you to do.

    Pass (P)

    Demonstrate baseline knowledge, accurate terminology, and core practical application.

    Merit (M)

    Provide detailed analysis, structured explanations, and clear workplace reasoning.

    Distinction (D)

    Deliver thorough evaluation, original problem solving, and fully justified recommendations.

    Before You Start

    Prior knowledge that will help with this topic

    • •Level 2 Diploma in Upholstery or equivalent practical experience.
    • •Basic knowledge of sewing techniques and fabric handling.
    • •Understanding of health and safety practices in a workshop environment.

    Coursework AI Review

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    Key Terminology

    Essential terms to know

    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Jig and template design principles
    • Material selection and preparation
    • Safe use of hand and power tools
    • Measurement and marking out techniques
    • Assembly and construction methods
    • Inspection, maintenance, and storage
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Jig and template design principles
    • Material selection for durability
    • Accurate measurement and marking out
    • Safe use of workshop machinery
    • Maintenance and storage practices
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates
    • Be able to produce jigs and templates, Know how to produce jigs and templates, Be able to maintain jigs and templates, Know how to maintain jigs and templates

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