Comparing Three Supplier Quotes Side by Side

What the sheet is actually for

A quote comparison sheet is a translation device, not a scorecard for the lowest number. Each supplier writes in its own vocabulary: one quotes a temperature taken at the heating film, another quotes a temperature taken at the inner lining, and a third quotes a figure from a lab report on a different sample. The sheet forces every line to answer the same question in the same unit, so the decision is made on the product and not on the formatting. Build it once for a programme, then re-issue it whenever the model, artwork or cell changes. A form filled against an earlier revision produces false confidence.

The fields that make three quotes comparable.

The list below is the field set I would keep. Copy it into a spreadsheet, add one column per supplier, and treat every blank as an open item rather than a zero. Fields that a supplier cannot fill should carry an owner and a date, not a guess.

Quote comparison field set

Field	What it captures	Why it matters
Model / part number	The exact variant quoted	Ties the quote to a golden sample
Unit price, currency, incoterm	Price basis and delivery term	Two quotes can differ only by the term
Tooling, fixture and NRE	Non-recurring engineering cost	It is amortized into unit price differently
Heating film type and zone count	Element construction and coverage	Drives wash tolerance and skin-side temperature
Skin-side temperature point	Which measurement point the figure refers to	Different points are not comparable
Test method and ambient condition	The record behind the thermal figure	A figure without a method cannot be compared
Wash tolerance basis	Cycles, method and post-wash electrical retest	Separates a claim from evidence
Fabric, lining, fill and coating	Composition of each layer	Affects drape, skin contact and care
Battery chemistry, capacity, pack report	Power source evidence	Safety file scope differs by pack
Stitching and seam construction	Seam type and reinforcement	Bounds how the core survives washing
Packaging dieline and artwork	Box spec, inserts and language list	A second tooling round is a common surprise
Compliance file package	Declarations, reports and their model scope	Scope and model consistency matter
Lead time and monthly capacity	Production window and ceiling	Determines whether the run fits the season
Payment terms and quote validity	Cash structure and expiry	Changes the total, not the unit

Normalize before you total

Three rules keep the columns honest. First, method: every thermal figure must carry the measurement point, the ambient condition and the test method. Second, conditions: runtime has to be stated by setting, by ambient temperature and by whether use is continuous or intermittent. Third, scope: include tooling, packaging, testing, compliance and freight so the total reflects what the buyer actually pays, not what the invoice first says. Only after those three rules are applied can the unit prices be placed next to each other.

Low unit price is not low landed cost.

There is a boundary worth stating plainly. A low ex-works unit price does not mean a low landed cost, and a low total does not mean a low-risk purchase. A supplier can quote the lowest unit price while pricing the nesting jig separately, quoting no dieline, or holding the compliance file for a different model. The buyer then pays for a second tooling round, a re-test and a delayed shipment. The sheet exposes that by putting the hidden lines on the same page as the unit price, before the purchase order is issued. The same logic applies to a signed quote: a quote is an offer, not a contract, and it is not a certificate of conformity.

The four conditions to write next to every line

Every thermal, runtime, wash and contact figure deserves a footnote, because each of them is only true under the conditions attached to it.

Thermal figure: measurement point, ambient temperature and test method.
Runtime: setting, ambient temperature, continuous or intermittent use.
Wash tolerance: cycle count, wash method and post-wash electrical retest result.
Skin contact: whether the figure comes from a simulated skin, a manikin or a probe, and at what contact pressure.

Questions to put back to the suppliers.

Which measurement point and ambient condition produced the temperature figure?
Is the heating film rated for the stated wash cycle, and is there a post-wash electrical retest?
Which document covers the quoted battery pack, and does it match the quoted model?
What exactly is inside the unit price, and what is quoted separately?
Which changes to the model, artwork or cell would trigger a re-quote?
Who signs the record that the golden sample matches the production specification?

Mistakes that quietly break the sheet

Comparing temperatures measured at different points or ambient conditions as if they were the same number.
Treating a cell report as though it covered the assembled pack.
Adding tooling back in by hand after the supplier quoted it as a separate line.
Reusing a quote issued against an earlier model or artwork revision.
Deciding on unit price before the compliance file scope and packaging are confirmed.

Each of these is caught by one discipline: name the artefact, name the condition and name the owner on the relevant line.

Frequently asked questions

Can one sheet cover both OEM and ODM quotes?

Yes, provided the field set stays the same and you add a development-stage column. The thermal, wash and skin-contact fields are identical in both paths; what changes is whether the supplier is building to your drawing or offering a standard platform. Keep the columns aligned so the comparison remains like-for-like.

Who should sign the comparison sheet?

The buyer side signs it, and the supplier side confirms the figures it supplied. A sheet signed only by the buyer records a decision, not an agreement. Where a figure came from a test report, the report reference and issue date belong in the same row.

Final takeaway

Compare the conditions behind the numbers, not the numbers alone: a quote that names its measurement point, its wash basis and its compliance scope is worth more than a lower headline price that does not.

Next step

Bring the field set from this article to your next supplier conversation, or request a tailored quotation via contact.