{"id":32205,"date":"2026-08-27T01:42:06","date_gmt":"2026-08-27T05:42:06","guid":{"rendered":"https:\/\/bagslebon.com\/?p=32205"},"modified":"2026-08-27T02:54:53","modified_gmt":"2026-08-27T06:54:53","slug":"prototype-vs-pre-production-sample","status":"publish","type":"post","link":"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/","title":{"rendered":"Prototype vs Pre-Production Sample: What Bag Buyers Should Approve"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A prototype and a pre-production sample should answer different questions. The prototype helps the buyer and factory resolve the product: size, access, structure, construction and appearance. The pre-production sample is used to confirm that the resolved product is ready to be released under controlled materials, components, artwork and documents.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The terms are not used identically by every company. Some factories use \u201cdevelopment sample,\u201d \u201ccounter sample,\u201d \u201capproval sample,\u201d \u201cconfirmation sample\u201d or \u201cgolden sample\u201d for overlapping stages. Do not approve based on the label alone. Define in writing what the sample contains, what it is intended to prove and whether approval authorizes bulk production.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#The_difference_is_the_decision_being_made\" >The difference is the decision being made<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Prototype_resolve_the_product\" >Prototype: resolve the product<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Pre-production_sample_confirm_the_released_product\" >Pre-production sample: confirm the released product<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#What_each_sample_should_and_should_not_approve\" >What each sample should and should not approve<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Approve_on_a_prototype_when_represented\" >Approve on a prototype when represented<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Do_not_approve_from_a_prototype_unless_verified\" >Do not approve from a prototype unless verified<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Approve_on_a_pre-production_sample_when_represented\" >Approve on a pre-production sample when represented<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Do_not_approve_when_an_unresolved_exception_changes_risk\" >Do not approve when an unresolved exception changes risk<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Why_buyers_accidentally_approve_bulk_too_early\" >Why buyers accidentally approve bulk too early<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#The_sample_looks_right_so_hidden_details_are_assumed\" >The sample looks right, so hidden details are assumed<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#A_substitute_is_described_only_in_a_message\" >A substitute is described only in a message<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Changes_are_approved_but_the_files_are_not_synchronized\" >Changes are approved but the files are not synchronized<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Approval_language_is_vague\" >Approval language is vague<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#A_change_after_the_pre-production_sample_needs_a_new_decision\" >A change after the pre-production sample needs a new decision<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#What_is_a_golden_sample\" >What is a golden sample?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#A_practical_approval_sheet_for_each_stage\" >A practical approval sheet for each stage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#How_many_sample_rounds_should_a_bag_need\" >How many sample rounds should a bag need?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#What_buyers_should_specify_before_each_sample_request\" >What buyers should specify before each sample request<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Next_step_before_bulk_production\" >Next step before bulk production<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/bagslebon.com\/de\/prototype-vs-pre-production-sample\/#Related_Sample_Development_Decisions\" >Related Sample Development Decisions<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_difference_is_the_decision_being_made\"><\/span>The difference is the decision being made<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/bagslebon.com\/wp-content\/uploads\/2026\/08\/bag-sample-stage-timeline.png\" alt=\"Bag sample stages from concept prototype to production release\"\/><figcaption class=\"wp-element-caption\">A sample stage is useful when its decision boundary is explicit. A visually attractive prototype is not automatically a bulk-production reference.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prototype_resolve_the_product\"><\/span>Prototype: resolve the product<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A prototype is normally used to explore or verify design decisions. Depending on the project, it may use available material, temporary hardware, simplified branding or hand-adjusted construction. Those substitutions can save time while the team checks:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>overall size and proportion;<\/li><li>intended contents and fit;<\/li><li>pocket access and organization;<\/li><li>handle drop and strap adjustment range;<\/li><li>opening geometry and zipper operation;<\/li><li>padding, stiffness and shape;<\/li><li>construction feasibility;<\/li><li>visual placement of features;<\/li><li>which requirements remain open.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The prototype is not poor quality simply because a declared substitute is used. The risk appears when the substitute is not recorded or when the buyer approves attributes the prototype was never intended to represent.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pre-production_sample_confirm_the_released_product\"><\/span>Pre-production sample: confirm the released product<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A pre-production sample should represent the approved product specification closely enough to support a production-release decision. The buyer should expect the intended material and component specifications, approved colors and artwork, resolved construction, current measurements, labels and relevant packaging details unless an exception is documented.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It should be linked to a dated revision. If anything is still substituted or pending, list it and decide whether the remaining risk is acceptable before authorizing bulk.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cSame as sample\u201d is not a complete instruction. The sample and the production documents need to agree.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_each_sample_should_and_should_not_approve\"><\/span>What each sample should and should not approve<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/bagslebon.com\/wp-content\/uploads\/2026\/08\/prototype-versus-preproduction-approval-matrix.png\" alt=\"Prototype and pre-production sample approval matrix\"\/><figcaption class=\"wp-element-caption\">Approve only the attributes the sample actually represents.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Approve_on_a_prototype_when_represented\"><\/span>Approve on a prototype when represented<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>silhouette, proportion and capacity direction;<\/li><li>location and usability of pockets and openings;<\/li><li>construction concept;<\/li><li>carrying configuration and access sequence;<\/li><li>appearance direction;<\/li><li>changes required for the next revision.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Do_not_approve_from_a_prototype_unless_verified\"><\/span>Do not approve from a prototype unless verified<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>exact bulk material color and hand feel;<\/li><li>final zipper, buckle, hook or hardware finish;<\/li><li>final logo appearance;<\/li><li>production measurement tolerance;<\/li><li>production packaging and labels;<\/li><li>performance Ergebnisse for a different material or construction;<\/li><li>bulk production release.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Approve_on_a_pre-production_sample_when_represented\"><\/span>Approve on a pre-production sample when represented<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>released material and component specifications;<\/li><li>final construction and reinforcement details;<\/li><li>finished measurements under the defined method;<\/li><li>artwork method, color, scale and placement;<\/li><li>labels, barcode content and packing presentation;<\/li><li>functional checks and required test evidence;<\/li><li>the document revision used for production.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Do_not_approve_when_an_unresolved_exception_changes_risk\"><\/span>Do not approve when an unresolved exception changes risk<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the pre-production sample uses a temporary zipper, substitute foam or unapproved print because the final material is unavailable, decide what that exception affects. A different zipper may change operation and appearance. Different foam may change dimensions and shape. A substitute logo process cannot approve the final logo result.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The buyer may authorize a limited next step, such as material booking, without authorizing full production. Record exactly what is released.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_buyers_accidentally_approve_bulk_too_early\"><\/span>Why buyers accidentally approve bulk too early<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_sample_looks_right_so_hidden_details_are_assumed\"><\/span>The sample looks right, so hidden details are assumed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An exterior review may not reveal internal reinforcement, backing material, seam allowance, adhesive, stitch access or edge treatment. Use construction records and, when appropriate, an open section or separate construction mock-up.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_substitute_is_described_only_in_a_message\"><\/span>A substitute is described only in a message<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Later team members may see the physical sample but not the message. Put substitutions on the sample card and in the sample report or specification.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Changes_are_approved_but_the_files_are_not_synchronized\"><\/span>Changes are approved but the files are not synchronized<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The sample maker may have followed chat comments that never reached the drawing or bill of materials. The physical sample becomes correct by memory while the bulk package remains wrong.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Approval_language_is_vague\"><\/span>Approval language is vague<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cLooks good\u201d might mean approve color, approve shape or approve production. Use attribute-level approval:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>approved for size and construction;<\/li><li>color not approved;<\/li><li>logo placement approved, print result pending;<\/li><li>packaging not reviewed;<\/li><li>not approved for bulk production.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_change_after_the_pre-production_sample_needs_a_new_decision\"><\/span>A change after the pre-production sample needs a new decision<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Not every small change requires rebuilding the entire bag, but every change needs an impact review.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/bagslebon.com\/wp-content\/uploads\/2026\/08\/change-after-preproduction-sample-impact-path.png\" alt=\"Impact path for a change requested after pre-production sample approval\"\/><figcaption class=\"wp-element-caption\">Review the impact before deciding whether a component proof, partial mock-up or complete resample is needed.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ask four questions:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Does the change affect fit, function, safety, compliance or a critical appearance requirement?<\/li><li>Does it change material, pattern, tooling, artwork, assembly sequence or inspection method?<\/li><li>Can the effect be verified with a component sample or partial mock-up, or is a complete sample required?<\/li><li>Which documents and approvals must be revised before production continues?<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Changing a hangtag text may require only artwork proof and document update. Moving a handle attachment can change load path, pattern, reinforcement, sewing sequence and measurements. Treating both changes as equal wastes time; treating both as harmless creates risk.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_a_golden_sample\"><\/span>What is a golden sample?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cGolden sample\u201d is often used for a retained, approved reference. Its authority must still be defined.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Identify the sample with product code, color, revision, approval date and sign-off. Record any limitations. Store it so that production and inspection teams can access an equivalent reference without damaging the only approved unit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A golden sample is most useful for aspects that are difficult to communicate completely in words or numbers, such as shape, hand feel or workmanship appearance. It should not override a newer controlled specification, hide unapproved substitutions or replace measurable requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_practical_approval_sheet_for_each_stage\"><\/span>A practical approval sheet for each stage<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/bagslebon.com\/wp-content\/uploads\/2026\/08\/bag-sample-approval-record.png\" alt=\"Approval record for prototype and pre-production bag samples\"\/><figcaption class=\"wp-element-caption\">Attribute-level approval prevents \u201clooks good\u201d from becoming accidental authorization for the complete product.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For every submitted sample, record:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>product code, color and size or style;<\/li><li>sample type as defined by the project;<\/li><li>sample number and date;<\/li><li>drawing, BOM, measurement and artwork revisions used;<\/li><li>materials and components used;<\/li><li>every substitution or exception;<\/li><li>dimensions measured and method used;<\/li><li>construction and functional checks completed;<\/li><li>required test status;<\/li><li>packaging and label status;<\/li><li>approved attributes;<\/li><li>rejected or open attributes;<\/li><li>next action, owner and due decision;<\/li><li>whether bulk production is authorized.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This record prevents a buyer\u2019s approval of one attribute from being interpreted as approval of the complete product.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_many_sample_rounds_should_a_bag_need\"><\/span>How many sample rounds should a bag need?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There is no honest universal number. A straightforward design based on a proven construction may resolve quickly. A new structured shape, unusual material, difficult opening, load-bearing feature or regulated requirement may need separate experiments and more than one full revision.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do not set the target as \u201cone sample.\u201d Set it as \u201cthe fewest samples needed to close the defined risks.\u201d Small construction mock-ups, material swatches, print strike-offs and component samples can answer some questions without remaking the entire bag.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The buyer can also reduce unnecessary rounds by returning consolidated comments with clear priorities, dimensions and annotated photos. Conflicting comments from different stakeholders create avoidable revisions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_buyers_should_specify_before_each_sample_request\"><\/span>What buyers should specify before each sample request<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For a prototype, send:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>the decision the prototype must support;<\/li><li>fixed requirements and open questions;<\/li><li>allowed substitutions;<\/li><li>intended contents, load and use condition;<\/li><li>measurements and features that must be checked;<\/li><li>the format for sample comments.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For a pre-production sample, send or confirm:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>the production-release document revision;<\/li><li>approved materials, components and colors;<\/li><li>final artwork and labels;<\/li><li>measurement method and acceptance criteria;<\/li><li>required functional or laboratory checks;<\/li><li>packaging specification;<\/li><li>any remaining exception and its approval path;<\/li><li>explicit authority required to begin bulk.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Next_step_before_bulk_production\"><\/span>Next step before bulk production<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you are unsure whether the current sample is a design prototype or a production-release sample, send the sample record, current tech pack and list of substitutions through our <a href=\"https:\/\/bagslebon.com\/contact\/#quote-form\">product inquiry form<\/a>. We can help separate what has already been approved from what still needs verification before bulk.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related resources:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/bagslebon.com\/bag-sampling-quality-control-process\/\">Bag sampling and quality control process<\/a><\/li><li><a href=\"https:\/\/bagslebon.com\/why-bag-drawing-is-not-enough-for-production\/\">Why a bag drawing is not enough for production<\/a><\/li><li><a href=\"https:\/\/bagslebon.com\/custom-bag-development-materials-logo-moq-inquiry-checklist\/\">Custom bag development and inquiry checklist<\/a><\/li><li><a href=\"https:\/\/bagslebon.com\/how-to-choose-custom-bag-factory-oem-odm\/\">How to choose a custom bag factory<\/a><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Technical references:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/asq.org\/quality-resources\/supplier-quality\" rel=\"noopener\">ASQ supplier evaluation methods, including prototyping and validation<\/a><\/li><li><a href=\"https:\/\/www.schaeffler.sk\/remotemedien\/media\/_shared_media_rwd\/01_company_1\/suppliers_4\/quality_1\/s296900_92\/s296900_92_a3_schaeffler_ppap_brochure_en.pdf\" rel=\"noopener\">Schaeffler supplier guidance on production-process and product approval<\/a><\/li><li><a href=\"https:\/\/www.normagroup.com\/content\/dam\/normagroup-com\/de\/global\/about-us\/purchasing\/NORMA-Group-Supplier-Quality-Manual.pdf\" rel=\"noopener\">NORMA Group supplier quality manual on prototype and pre-production control<\/a><\/li><\/ul>\n\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Related_Sample_Development_Decisions\"><\/span>Related Sample Development Decisions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/bagslebon.com\/how-to-control-tech-pack-revisions-during-bag-sampling\/\">How to control the tech-pack revision behind each sample<\/a><\/li><li><a href=\"https:\/\/bagslebon.com\/why-a-bag-sample-does-not-match-the-reference-image\/\">How to diagnose a bag sample that differs from a reference image<\/a><\/li><li><a href=\"https:\/\/bagslebon.com\/how-to-write-bag-sample-feedback-that-a-factory-can-act-on\/\">How to write sample comments the factory can implement<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A prototype and a pre-production sample should answer different questions. The prototype helps the buyer and factory resolve the product: size, access, structure, construction and appearance. The pre-production sample is used to confirm that the resolved product is ready to be released under controlled materials, components, artwork and documents. 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