Most kit quotes come back slow because the request was incomplete, not because the supplier was. Here is what a bill of materials has to carry before anyone can price it honestly.
Why quotes come back slow or wrong
A kit price is the sum of a lot of small decisions. When those decisions are missing, a supplier has three options. Ask you twenty questions, which costs a week. Guess, which produces a number that changes later. Or pad, which produces a number that loses the deal for the wrong reason.
None of those serve you. A complete request gets a real number faster, and more importantly it gets a number that holds when you go to production.
The component list is the easy part
Everyone remembers to list the parts. Almost nobody lists the parts at the level of specificity that determines what they cost to buy and to build.
A line that says “collection tube” is not a bill of materials line. A line that says “2.0 mL externally threaded skirted-base tube, polypropylene, sterile, with an O-ring cap, supplied bulk non-racked” is one. The first version cannot be sourced. The second can be quoted the same day.
For each component, the request should carry the material, the size, the volume, the sterility requirement, the color if it matters, the packaging format it arrives in, and whether a specific part number is required or an equivalent is acceptable. That last field saves more time than any other, because it tells the supplier whether they are allowed to help you.
The specifications that actually drive the build
- Fill volume and fill tolerance if any component is a liquid, plus the tube it goes into and the SOP it is filled to
- Closure requirement, including whether tubes ship capped, torqued to a spec, or loose
- Label count, size, material, adhesive, and whether any of them are variable data, serialized, or barcoded
- Where each label goes, because a tube label, a pouch label and an outer carton label are three different operations
- Instructions for use: page count, size, fold, color, and who controls the document
- Inner packaging: pouch, tray, insert, desiccant, absorbent, biohazard bag
- Outer packaging: box style, board, print treatment, and whether it is a shipper or needs an overbox
- The return path, including whether a return label and return packaging are inside the kit
The return path is the single most commonly omitted item, and it is often the second largest line in the kit.
The program facts
These are not component questions. They change the build itself:
- Annual volume, and the release cadence. Ten thousand a year in one run and ten thousand a year in monthly runs are different programs.
- Minimum and typical lot size
- Required shelf life for the finished kit, and the shortest dated component in it
- Storage and shipping temperature requirements, ambient or controlled
- Lot control and serialization requirements, including whether a kit ID must be readable and reported back
- Where kits ship to: patient homes, clinics, distributors, or a mix, and in which countries
- Whether kits ship individually or in bulk cases, and the case configuration if bulk
The regulatory and document facts
These decide the structure of the relationship, not just the price, and they are worth answering before the first call rather than after the proposal:
- Who is the legal manufacturer of record
- Whose name appears on the label
- Who owns the device history record
- Who holds finished-kit release authority
- Who controls the instructions for use and the artwork
- Which markets the kit will be sold or distributed into
If you do not know the answers, that is fine and normal, and it is exactly the conversation to have first. What does not work is leaving them undefined and discovering the disagreement at launch.
What to do about the parts you have not decided
Mark them as open rather than guessing, and say what you are optimizing for. “Box is open, we want the premium presentation” and “box is open, we want the cheapest compliant option” produce completely different quotes and both are useful. A blank field produces neither.
For anything genuinely undecided, ask for the quote to be structured so that option shows as a variable. A good supplier will price the base kit and then show you what each open decision does to it.
The short version to copy into your request
- Component list with full specs and equivalent-acceptable flags
- Fill volumes, tolerances and the governing SOP
- Full label schedule with placement and variable data
- IFU spec and who controls it
- Inner and outer packaging spec, or the optimization target if open
- Return path, including label and return packaging
- Annual volume, lot size and release cadence
- Shelf life, storage and shipping temperature
- Lot control, serialization and any reporting requirement
- Ship-to model, channels and destination countries
- Legal manufacturer, label owner, DHR owner, release authority
- Target launch date and any hard regulatory or commercial deadline
Related reading: Questions to ask before you integrate and Audit your specimen kit supplier.
A complete BOM is not paperwork for the supplier. It is the fastest way to find out what your kit actually costs and whether the partner in front of you knows what they are doing.
