{"id":2098,"date":"2026-10-23T09:10:00","date_gmt":"2026-10-23T01:10:00","guid":{"rendered":"https:\/\/lemaele.com\/blog\/micro-switch-lot-traceability\/"},"modified":"2026-10-22T11:13:53","modified_gmt":"2026-10-22T03:13:53","slug":"micro-switch-lot-traceability","status":"publish","type":"post","link":"https:\/\/lemaele.com\/pt\/blog\/micro-switch-lot-traceability\/","title":{"rendered":"Micro Switch Lot Traceability: Link Delivered Parts to OEM Records"},"content":{"rendered":"<style>.lema-article{max-width:100%;min-width:0}.lema-article img{max-width:100%;height:auto}.lema-article table{border-collapse:collapse;min-width:580px}.lema-article th,.lema-article td{border:1px solid #ddd;padding:10px;text-align:left;vertical-align:top}<\/style>\n<div class=\"lema-article\">\n<p>Micro switch lot traceability connects the component received by an OEM to its purchase specification, supplier lot, inspection decision and eventual assembly use. A readable bag label alone is insufficient: the relationship must survive repacking, partial issues, returns and work in progress. Start with the complete ordered part identity, preserve the supplier&#8217;s actual lot information, and record every event that changes custody or disposition. Traceability supports investigation and containment; it does not prove that an untested switch is conforming or that every unit in a lot has identical performance.<\/p>\n<h2>Define what must be traced before requesting labels<\/h2>\n<p>For a Lemaele <a href=\"https:\/\/lemaele.com\/product\/kw7-series-micro-switch\/\">KW7 product inquiry<\/a>, separate the family name from the exact configuration requested. Actuator form, terminal arrangement and the applicable controlled drawing belong in the purchasing record when they affect the assembly. A generic family description should not silently stand in for the agreed variant. Ask what identifiers the supplier actually provides and what each identifies. A date code may represent production time, packaging time or another event; its meaning needs confirmation rather than visual guesswork.<\/p>\n<p>Specify the investigation question that the records must answer. One OEM may need to locate unused material from a suspect shipment; another may need to identify assemblies containing a particular supplier lot. Those questions require different event records. Agree the needed level before delivery, including whether tracing is by supplier lot, package, internal batch or individual unit. Do not require serial numbers merely because a software system has a serial-number field. An identifier is useful only when its relationship to the physical material remains controlled.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/lemaele.com\/wp-content\/uploads\/2026\/10\/lema-micro-switch-lot-traceability-body1-20261022.webp\" alt=\"Separate KW7 specimens in individual trays beside blank identity cards\" title=\"Separate KW7 specimens in individual trays beside blank identity cards\" width=\"1536\" height=\"1024\" loading=\"lazy\"><figcaption>Separate KW7 specimens in individual trays beside blank identity cards. Product-reference illustration; separate objects are not an approved installation or measured test result.<\/figcaption><\/figure>\n<h2>Keep identity, evidence and release as separate records<\/h2>\n<p>The <a href=\"https:\/\/csrc.nist.gov\/pubs\/ir\/8536\/final\" rel=\"noopener\" target=\"_blank\">NIST manufacturing supply chain traceability framework<\/a> addresses verifiable traceability information across manufacturing supply chains. It does not establish that a particular micro switch is certified or that the supplier implements a particular information system. Use the framework to ask clear questions about what is identified, which records support that identity and how information can be exchanged and checked. Keep customer-specific requirements distinct from the supplier&#8217;s verified current capability.<\/p>\n<p>A certificate, inspection report and package label serve different purposes. The label links physical material to an identity; the report describes observations under a stated method; the release decision authorizes a particular use or disposition. Store the relationships between them, while retaining their individual meanings. A receiving clerk should not have to infer approval from a filename. Likewise, a complete traceability chain cannot replace an absent electrical requirement, an unapproved actuator change or a test that was performed on a different configuration.<\/p>\n<h2>Build a receiving record that survives partial deliveries<\/h2>\n<p>Record the purchase order line, complete ordered part, received quantity, supplier identifier, receipt date and storage location. Include the actual label image or transcription where useful, with a check for ambiguous characters. Preserve both the supplier&#8217;s original value and the OEM&#8217;s internal reference. If the internal system cannot accept a slash or a leading zero, document the transformation explicitly. Quietly normalizing the identifier can make two different values look identical and can break a later search across organizations.<\/p>\n<p>A partial shipment may arrive in several packages bearing the same lot, or one shipment may contain several lots. Neither arrangement should be assumed. Inspect the delivered packaging and record the actual relationships. The <a href=\"https:\/\/lemaele.com\/blog\/switch-incoming-inspection-lot-acceptance\/\">incoming inspection guide<\/a> concerns acceptance evidence; the traceability record concerns which physical population that decision covers. When a report identifies a sample, connect that sample to the correct received population rather than attaching the report indiscriminately to every package on the purchase order.<\/p>\n<h2>Use event records at the points where identity can be lost<\/h2>\n<div class=\"lema-table\" style=\"max-width:100%;overflow-x:auto\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Event<\/th>\n<th scope=\"col\">Preserve<\/th>\n<th scope=\"col\">Check<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Receipt<\/td>\n<td>Supplier lot and complete ordered variant<\/td>\n<td>Physical label matches recorded material<\/td>\n<\/tr>\n<tr>\n<td>Split<\/td>\n<td>Parent lot and resulting container references<\/td>\n<td>Every child container remains identifiable<\/td>\n<\/tr>\n<tr>\n<td>Assembly issue<\/td>\n<td>Actual input lots and output batch relationship<\/td>\n<td>Recorded granularity matches process capability<\/td>\n<\/tr>\n<tr>\n<td>Return<\/td>\n<td>Identity condition and previous disposition<\/td>\n<td>Uncertain material remains separately controlled<\/td>\n<\/tr>\n<tr>\n<td>Investigation<\/td>\n<td>Search criteria population and known gaps<\/td>\n<td>Backward and forward relationships reconstructable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>The table is an operational checklist, not a prescribed regulatory record format. Adapt the fields to the OEM&#8217;s actual product and contractual requirements. An event record should contain enough detail to reconstruct the relationship without requiring a person&#8217;s memory. A warehouse transfer that preserves an intact label may need less detail than a repacking operation that creates several new containers. The critical question is whether a later investigator can connect every resulting container back to its source without ambiguity.<\/p>\n<p>At each handoff, assign responsibility for recording the event and checking the physical label. Data entry after the material has already been mixed is a weak control because the missing relationship may be impossible to reconstruct. If scanning is used, check what the scan confirms. Reading a code accurately does not show that the code is attached to the right bag, that the bag contains the stated variant, or that an operator has selected the correct production order in the system.<\/p>\n<h2>Control splitting, mixing and assembly consumption<\/h2>\n<p>When one supplier lot is split into several internal containers, give each resulting container a controlled reference linked to the parent lot. Record the quantity moved and retain the supplier identity. Use a deliberate reconciliation method for the quantities that matter to the business. Do not claim precise unit-level traceability if the process only records bulk issues to a work area. Describe the true granularity so containment decisions can use a realistic population rather than a falsely narrow one.<\/p>\n<p>Mixing lots expands the population associated with an output. Avoid mixing when preserving separation is practical and useful, but do not fabricate separation after it has been lost. If several lots feed one assembly batch, record all actual inputs and the time or order boundaries that can be supported. Rework deserves the same attention: a replacement switch can change the traceability relationship of a finished assembly even when its external serial number remains unchanged. Record both removal and replacement according to the controlled process.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/lemaele.com\/wp-content\/uploads\/2026\/10\/lema-micro-switch-lot-traceability-body2-20261022.webp\" alt=\"KW7 specimen beside a carton and empty compartment trays\" title=\"KW7 specimen beside a carton and empty compartment trays\" width=\"1536\" height=\"1024\" loading=\"lazy\"><figcaption>KW7 specimen beside a carton and empty compartment trays. Product-reference illustration; separate objects are not an approved installation or measured test result.<\/figcaption><\/figure>\n<h2>Handle uncertainty without inventing missing history<\/h2>\n<p>If a package has no readable lot identity, hold its disposition separately from material whose relationship is known. Preserve the original packaging and any available delivery documentation. Ask the supplier what can be established from those records, while distinguishing confirmed information from inference. Do not manufacture a supplier lot value from the arrival date. An internal quarantine reference can identify the uncertain material without pretending to recover historical information that is no longer available.<\/p>\n<p>Returned and unused material needs a defined route back into stock. Confirm identity, condition and previous exposure before release; the <a href=\"https:\/\/lemaele.com\/blog\/electromechanical-switch-storage-shelf-life\/\">storage and lot-release article<\/a> addresses the condition question separately. A container returned from a line may contain mixed variants, opened bags or parts subjected to an unknown process. Traceability can describe that uncertainty, but cannot remove it. Record the final disposition and its authorizing person or function so the material does not quietly reappear as ordinary stock.<\/p>\n<h2>Connect changes and investigations to the right population<\/h2>\n<p>A <a href=\"https:\/\/lemaele.com\/blog\/switch-supplier-change-notification\/\">supplier change notification<\/a> may introduce a new revision, process boundary or transition lot. Capture the actual change boundary provided and agreed, including any limits on its precision. The date of the notification is not automatically the date on which every delivered component changed. If old and new material coexist, keep their identities and permitted uses clear. Ask how replacement shipments, residual stock and subsequent deliveries will be identified before accepting a transition plan.<\/p>\n<p>During an investigation, trace both backward and forward. Backward tracing connects a suspect assembly to its material inputs; forward tracing identifies other stock or assemblies sharing those inputs. The resulting list is a containment aid, not a statistical proof that every listed assembly is defective. Record the search criteria, data cutoff and known gaps. A wider precautionary population may be appropriate when the process cannot establish a narrower boundary, but the reasoning should remain visible to the responsible decision makers.<\/p>\n<h2>Verify the process with a reconstruction exercise<\/h2>\n<p>Choose a real released assembly batch and attempt to reconstruct the component trail using the ordinary records. Check whether the team can identify the relevant supplier lots, receiving decisions and material movements without relying on informal recollection. Then choose a supplier lot and try the forward search. These two exercises expose different weaknesses. Measure the practical outcome: whether the population can be identified, what remains uncertain, and which record or physical control would close the gap.<\/p>\n<p>The <a href=\"https:\/\/www.nist.gov\/pml\/nist-technical-note-1297\" rel=\"noopener\" target=\"_blank\">NIST measurement uncertainty guidance<\/a> addresses a different question: how a measurement result is evaluated. Do not confuse an item&#8217;s identity trail with evidence supporting its measured characteristics. Retain both where needed, with their separate meanings clear. Preserve records in a form that remains readable over the retention period required by the customer, product and business. Backups, permission controls and a way to export relationships matter when an investigation occurs after staff or software have changed.<\/p>\n<h2>Further learning: sampling and the identified lot<\/h2>\n<p>NPTEL IIT Kharagpur: Lecture 54: Acceptance Sampling: Key Concepts. NPTEL explains sampling and the identified population. This supports linking a sample decision to a known lot; it does not certify traceability or prescribe record retention.<\/p>\n<div style=\"position:relative;width:100%;aspect-ratio:16\/9\"><iframe style=\"position:absolute;inset:0;width:100%;height:100%;border:0\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/4H5wdZ3qHZU\" title=\"Lecture 54: Acceptance Sampling: Key Concepts\" loading=\"lazy\" allow=\"accelerometer; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<p><a rel=\"noopener\" href=\"https:\/\/www.youtube.com\/watch?v=4H5wdZ3qHZU\" target=\"_blank\">Watch Lecture 54: Acceptance Sampling: Key Concepts<\/a>.<\/p>\n<p>The educational material explains the distinction between observing samples and deciding about a population. Its relevance here is the need to define which lot the sample represents. It does not prescribe traceability software, establish retention periods or certify the delivered switches. Connect any actual acceptance plan to the identified population and agreed requirements; a video example cannot authorize release of material whose identity or specification is uncertain.<\/p>\n<h2>Questions to resolve in an OEM request<\/h2>\n<p>Before ordering, ask for the complete part identity, the meaning and availability of lot codes, the package labeling arrangement and the documents that can actually accompany delivery. State any required link between material and inspection evidence. Discuss partial deliveries, replacement material and the handling of a change boundary. Keep the request proportionate to the investigation questions the OEM must answer. A simple, consistently maintained relationship is more useful than an elaborate list of fields that nobody can populate reliably.<\/p>\n<p>For the wider purchasing review, the <a href=\"https:\/\/lemaele.com\/blog\/micro-switch-manufacturer-china-guide\/\">micro switch OEM sourcing guide<\/a> connects the identity requirement to supplier evaluation and product specification. Keep the traceability request consistent with the part actually ordered.<\/p>\n<h2>Frequently asked questions<\/h2>\n<h3>Does a lot number prove switch quality?<\/h3>\n<p>No. It identifies a population or relationship according to its confirmed meaning. Product conformity requires the applicable specification and acceptance evidence. Preserve identity and acceptance as separate linked records.<\/p>\n<h3>Can several containers share one supplier lot?<\/h3>\n<p>Yes, where that reflects the actual supplier identity. Give internal containers references where needed and preserve their relationship to the original lot. Do not assume that one package always equals one production lot.<\/p>\n<h3>What if the original label is missing?<\/h3>\n<p>Keep the uncertain material identifiable and separate from released stock. Preserve remaining documentation and ask the supplier what can be confirmed. Do not invent a supplier code from the receiving date or an unverified recollection.<\/p>\n<h3>Must every switch have a serial number?<\/h3>\n<p>Not universally. Define the traceability granularity needed for the product and customer. A controlled lot relationship can be useful; individual serialization only helps when physical handling and records maintain that relationship.<\/p>\n<\/div>\n<p><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does a lot number prove switch quality?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. It identifies a population or relationship according to its confirmed meaning. Product conformity requires the applicable specification and acceptance evidence. Preserve identity and acceptance as separate linked records.\"}}, {\"@type\": \"Question\", \"name\": \"Can several containers share one supplier lot?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, where that reflects the actual supplier identity. Give internal containers references where needed and preserve their relationship to the original lot. 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A controlled lot relationship can be useful; individual serialization only helps when physical handling and records maintain that relationship.\"}}]}<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Build an OEM micro switch lot-traceability record through receiving, repacking, assembly use and returns, with clear limits on identity and acceptance evidence.<\/p>","protected":false},"author":9,"featured_media":2095,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[51],"class_list":["post-2098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-micro-switch"],"_links":{"self":[{"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/posts\/2098","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/comments?post=2098"}],"version-history":[{"count":1,"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/posts\/2098\/revisions"}],"predecessor-version":[{"id":2099,"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/posts\/2098\/revisions\/2099"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/media\/2095"}],"wp:attachment":[{"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/media?parent=2098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/categories?post=2098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lemaele.com\/pt\/wp-json\/wp\/v2\/tags?post=2098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}