When your business changes
What Changes When You Change a Product or Manufacturing Process?
A successful trial does not prove that every customer approval, work instruction, traceability record and downstream use has changed with the process. The risk often sits in the gap between what production now does and what the business can evidence.
Change in practiceIllustrative example
A components manufacturer changes the coating process on a standard product line, moving from a solvent-based finish to a water-based alternative to meet a major customer’s sustainability requirement and reduce material cost. Trial batches pass visual and basic performance checks, so the change enters routine production. Leadership remains focused on the customer relationship, cost target and getting the line running smoothly. The customer’s original approval and warranty documents still name the previous finish, several operators are following verbal instructions because the formal work instruction has not been rewritten, and products made to the old and new specifications are held in the same finished-goods stock without a reliable way to distinguish them. The process has changed; the surrounding controls have not caught up.
This applies whenever the business changes what it makes or how it makes it: a material, formulation, coating, component, supplier specification, production method, software setting or critical process parameter. The driver may be cost, availability, customer demand, sustainability, performance or capacity.
Recognise it when trial results have justified routine production before every relevant specification, customer approval, work instruction, inspection plan, training record and traceability control has been updated; when the decision has been treated as a technical or commercial adjustment rather than a formal controlled change; or when old and new versions coexist in stock, documentation, production systems or the customer’s understanding.
Product performance, durability, compatibility, safety or liability characteristics may have changed even when initial trials appear satisfactory. A trial proves only what was actually tested under the conditions tested; it does not automatically validate every operating condition, customer application or downstream use.
Customer specifications, approvals, warranties and contractual descriptions may no longer match what is being supplied. Quality, hazard, environmental or process assessments prepared for the previous material or method may also need review. If formal instructions, inspection criteria and training lag behind the line, output may vary between operators or shifts even when the intended new process is sound.
Traceability becomes especially important while old and new specifications coexist. If the business cannot identify which material, method and controls applied to each batch, a narrow concern can become a wider containment, investigation and customer-communication problem.
The business may now depend on the new material and its supplier, validated process parameters, testing capability, updated customer approval and the people who understand how the trial was translated into routine production.
Until that knowledge is embedded in controlled instructions, inspection plans and training, the process may depend disproportionately on the trial team or one technical specialist. The traceability system must also connect material lots, process settings, operators, inspection results and finished batches strongly enough to distinguish old specification from new. If one link is missing, the business may be unable to prove which product was made under which conditions.
During the first 30 days of routine production, the immediate test is whether the business could isolate and explain a concern without stopping or questioning every batch made before and after the change. If a deviation, complaint or unexpected performance result appeared, leadership would need to identify the affected specification, material lots, process parameters, operators, inspection evidence, stock and shipped product quickly.
Where customer approval still describes the old specification, the business may also need to establish whether the new product was authorised before it can decide what to release, hold, rework or discuss with the customer. Mixed stock and verbal instructions can turn a technically manageable issue into a much larger operational and commercial interruption.
- Growth & Change — a product or process improvement changes the risk profile around production and should trigger controlled review before becoming routine.
- Claims & Defensibility — customer approvals, specifications, validation evidence and batch traceability determine whether the business can explain and defend what was supplied.
- People & Workforce — consistent production depends on the new method being translated from trial knowledge into controlled instructions, competence and supervision across every relevant shift.
Start with the formal change-control record for this specific decision. It should identify the reason for change, accountable owner, affected products and customers, validation scope, approval requirements, documents to update, implementation date and criteria for reviewing performance after rollout.
Compare the new product and process against current customer specifications, approvals, warranties and contractual commitments. Where customer consent or technical verification may be required, establish the position before further routine supply rather than assuming trial success is sufficient. Review validation data against the real range of production conditions and intended customer uses, including what was not tested.
Check that controlled work instructions, process limits, inspection plans, training and competence records describe what operators are actually doing. Confirm material and batch records can distinguish old and new specification product in production, finished stock and, where necessary, product already shipped. Retain relevant supplier information, test results and samples so a later investigation is not dependent on memory.
- 01Did this change pass through a formal change-control process, or did a successful trial become routine production through momentum?
- 02Do our customer approvals, specifications and warranty commitments accurately describe what we now manufacture and supply?
- 03What did the validation actually test, and which operating conditions, customer applications or downstream effects remain unproven?
- 04Can every relevant operator and shift follow a current controlled instruction, or does the new process still depend on verbal knowledge held by the trial team?
- 05Could we identify and separate every batch made to the old and new specifications—including stock and shipped product—within hours rather than days?
- 01Complete and approve a documented change-control review covering validation, customers, specifications, safety information, instructions, inspection, training and traceability before further routine production.
- 02Reconcile customer approvals and contractual product descriptions with the new specification, obtaining any required confirmation and recording the basis on which supply can continue.
- 03Physically and digitally distinguish old- and new-specification product, then run a traceability exercise from material lot and process settings through finished stock and shipped batches.
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