How to Switch Manufacturers Without Breaking Your Product
A new manufacturer following the same formula will not automatically produce the same product. Equipment, process and materials all differ. Transfer the documentation, re-qualify properly, run a comparison batch, and keep the old supply running until it matches.
Why the Product Changes
This guide is for brand owners in India moving production to a new manufacturer.
A formula is a list of ingredients and quantities. It does not capture mixing order, mixing time, temperature profile, granulation method, equipment type, compression parameters, drying conditions or the specific raw material suppliers used. All of those affect the finished product.
So a new manufacturer given your formula will produce something close but rarely identical. The tablet may be harder, the powder may disperse differently, the cream may feel slightly different, the taste may shift. Consumers notice these differences even when they cannot name them, and distributors notice them immediately.
The move is therefore a development exercise with a known target rather than a simple transfer. The target is the product your customers already have, and the work is matching it.
Plan the timeline accordingly. A switch managed properly takes longer than a first launch, because you are matching something rather than creating it.
What to Transfer
Documentation first, before any production.
| Item | Why It Matters |
|---|---|
| Signed product specification | The target the new manufacturer must meet |
| Full formula with quantities | The starting point |
| Process description | Mixing order, times, temperatures, equipment type |
| Raw material specifications | Including grade, particle size and supplier where relevant |
| Current raw material suppliers | Since changing them changes the product |
| Approved reference samples | Physical samples for appearance, taste and texture |
| Existing certificates of analysis | Several batches, showing actual figures |
| Stability protocol and data | So the new product can be compared and the shelf life supported |
| Packaging specifications | Each component in detail |
| Approved artwork | Current version, with the licence details to be updated |
| Complaint history | So known issues are not reintroduced |
| Batch records | Where you hold them, as the clearest process description |
Raw material suppliers matter more than brand owners expect. A botanical extract from a different supplier at the same stated standardisation can behave differently, so transferring the supplier list and keeping it initially is the safest approach.
Qualifying the New Manufacturer
Do this before committing, not during.
- Verify the licence scope covers your exact category and dosage form.
- Verify certifications are current and cover your product.
- Request a real certificate of analysis for a similar product.
- Confirm they can source your specified raw materials, or discuss alternatives explicitly.
- Confirm their equipment can run your process, and where it differs.
- Discuss where they would need to deviate from your current process and why.
- Confirm their testing arrangements and the laboratory’s accreditation.
- Agree the full documentation set you will receive per batch.
- Agree retention sample arrangements.
- Confirm minimums and lead times.
- Settle formulation ownership in the new agreement.
- Confirm what happens to your formula if the relationship ends.
The Comparison Batch
The step that determines whether the switch works.
Run a Trial First
Before a full production batch, a trial batch tested against the existing product side by side. Cheaper to adjust at this stage.
Test Against Existing Product
Not only against specification. The specification has tolerances, and two products at opposite ends of the same tolerance differ noticeably.
Blind Sensory Comparison
Have people compare the two without knowing which is which. This is the test that matters for consumer-noticeable differences.
Start Stability Afresh
The new product is a new product for stability purposes. The old data does not transfer.
Testing against the existing product rather than against the specification is the key discipline. A new batch at the other end of every tolerance is compliant and visibly different, which is exactly the outcome a switch should avoid.
Managing the Transition
Practical sequencing.
Keep the existing manufacturer supplying until the new output matches. This costs the overlap but avoids both a stock gap and a product change in the market.
Update artwork for the new manufacturer’s details and licence number, and run that through your full artwork approval process. This is a common point of failure, since the change feels administrative and gets approved quickly.
Plan the changeover by batch rather than by date, so you know which batch numbers came from which plant. If a complaint arises later, that distinction matters.
Tell your distributors that production has moved, and give them the new batch number series. They will notice small differences and an explanation prevents speculation.
And run the first several batches from the new manufacturer with a wider test panel than usual, comparing figures against both the specification and the old manufacturer’s historical results.
Checklist
Switching manufacturers.
- Verify the new manufacturer’s licence scope and certifications.
- Transfer the signed specification, formula and full process description.
- Transfer raw material specifications and current supplier details.
- Transfer approved reference samples and several existing certificates of analysis.
- Transfer stability data, packaging specifications and complaint history.
- Discuss explicitly where their process or materials must differ.
- Settle formulation ownership in the new agreement.
- Run a trial batch before full production.
- Test the trial against the existing product, not only against specification.
- Run a blind sensory comparison.
- Adjust and repeat the trial until it matches.
- Start a fresh stability study on the new product.
- Update artwork for new manufacturer details through full approval.
- Keep the existing supply running until output matches.
- Plan the changeover by batch number, not by date.
- Inform distributors and give them the new batch series.
- Run a wider test panel on the first several new batches.
- Compare figures against both specification and historical results.
Considering Moving Your Production?
Share your product, specification and volume and our team will set out what we would need to match it and how we would qualify it.
Frequently Asked Questions
Why does the product change when I switch manufacturers?
Because a formula does not capture mixing order, times, temperatures, equipment type, granulation method, compression parameters, drying conditions or raw material suppliers, and all of those affect the finished product.
What should I transfer besides the formula?
The signed specification, full process description, raw material specifications and current suppliers, approved reference samples, several existing certificates of analysis, stability data, packaging specifications, approved artwork and complaint history.
What is the key testing discipline?
Testing the new product against the existing product, not only against specification. The specification has tolerances, and a new batch at the other end of every tolerance is compliant and visibly different, which is exactly what a switch should avoid.
Does my existing stability data transfer?
No. The new product is a new product for stability purposes, so a fresh study is needed in the final pack to support the shelf life you declare.
How should I sequence the changeover?
Keep the existing manufacturer supplying until the new output matches, plan the changeover by batch number rather than by date so you know which batches came from which plant, and inform distributors with the new batch series.