Tender language for a public laboratory

Public laboratories often buy against a written specification. The scientific part of that writing is the same discipline as any other sourcing note: performance a bidder can meet, documents a bidder can attach, and a test the laboratory will use to judge equivalence. The institution's procurement office owns the form, the timetable, and the rules of the competition. This page does not. It explains the language a laboratory can hand to that office so the science survives contact with a tender. The cluster method is how to write a laboratory sourcing enquiry. A specification can be discussed through laboratory procurement. University groups can also start from academic research, and the file can move through a quotation request or contact.

Who writes which sentences

You write the lines that describe the measurement, the preparation, or the storage class. The procurement office writes the envelope: how to submit, what declarations the institution requires, and how a bid is opened. Mixing those jobs produces tenders that name a catalogue page and call it a requirement. A responsive bidder is then someone who stocks that page in their memory, which is not a scientific test.

The decision this language supports is whether a later bid can be scored without a private phone call. If only one person in the building knows why the words were chosen, the tender is not yet public in any useful sense. Write so a colleague, an auditor, and a bidder who has never visited the laboratory can all see the same pass mark.

A requirement more than one bidder could meet

Mandatory performance is the set of lines that define a pass. Each line needs a unit, a class, or a document. "A reliable freezer" is not a line. "A freezer that holds the manufacturer's stated frozen class of −20 °C or −80 °C, as your samples require, with a temperature record the laboratory can read" is closer. Follow the product class your samples actually need, and do not invent a tightness the biology does not use. Excess tightness is how a tender collapses onto one model by accident.

Range, accuracy or readability, capacity, the vessel or format the laboratory already uses, the environment (bench, cold room, power quality the building can offer), and the document set are the usual families. For a reagent, identity, grade, activity unit, and storage class play the same role. NIST's laboratory metrology pages are a public reminder that a measurement claim belongs to a procedure. You do not need a national metrology essay in a tender. You do need to say which check counts as a pass.

Separate mandatory lines from desirable lines. A desirable line can break a tie. It should not silently become mandatory on the day you read the bids. Mark the difference in the document, in words the procurement office can keep.

The named example and the equivalence test

A named instrument or reagent can help bidders understand the job. Put it in a column labelled example. The mandatory column stays the performance. Equivalence is then a judgement with a method: the bid meets every mandatory line, supplies the document set, and accepts the receipt test. A bid that matches the example's colour and misses the calibration document is not equivalent. A bid that misses the example's brand and meets every mandatory line is equivalent, unless you have written a justified lock.

Say this in one sentence the bidder can find: equivalence will be judged by compliance with the numbered mandatory lines and by the acceptance test, not by similarity of a trade name. If your procurement office uses different words, keep their words and keep this test.

Avoid a fake opening. "Or equivalent" with no test is a rumour with punctuation. "Brand X only" with no performance is a closed door you may not be allowed to shut, and it is also bad science when another product would do the job. The procurement office decides what the form may legally say. You decide what the science must be able to defend.

A worked paragraph for a balance

Imagine the laboratory needs a balance for preparing buffers and for checking a few reference masses. A weak tender line says "analytical balance, brand example, or equivalent". A usable paragraph says the following, in the laboratory's own words.

The balance shall have a readability of 0.1 mg or finer over the range the laboratory names (state the maximum load you actually weigh). It shall be suitable for the bench environment you have, including a draft shield. On receipt the laboratory will verify it with the reference masses it already controls, and the verification must fall inside the limit the laboratory writes in the tender. The bidder shall supply the manufacturer's installation or calibration record that the institution's quality file requires. An example of a product that has met similar lines in this laboratory's experience may be named in an annex. Meeting the example's brand is not required. Meeting the readability, the shield, the document, and the verification is required.

That paragraph still needs the procurement office to set the submission rules. It does not set a price, and it does not promise that any particular seller will bid. It gives two competent balance makers a fair chance to be responsive.

When a bid looks responsive and is not

Read the mandatory numbers before the covering letter. A bid that attaches a glossy brochure and leaves your readability line unanswered has not met the line. A bid that offers a coarser readability "which is usually enough" has taken an exception. Record the exception. Do not translate it into a pass because the rest of the bid is convenient.

A second failure mode is the hidden single source. The laboratory adds a port, a software dongle, and a consumable format that only one maker sells, none of which the method requires. The tender then looks open and behaves shut. Before you publish, ask a colleague who does not run the assay to try to imagine a second product. If they cannot, either the science truly locks the design, and you should say so plainly for the procurement office, or you have specified a rumour.

A third failure is judging equivalence by a meeting. Equivalence that lives in a conversation will be remembered differently by the bidder and by the next auditor. Write the test. File the score against the numbers.

Safety and research limits inside a tender

A tender can ask for a safety data sheet, a containment note the institution already requires, and electrical or pressure information the building needs. It cannot appoint your biosafety committee. The WHO laboratory biosafety manual describes institutional responsibility for laboratory biosafety. Your committee, not this article and not the bidder's brochure, decides whether a purchase changes containment. Research specifications are not diagnostic claims. Do not write clinical performance into a research tender to make the instrument sound serious.

The procurement office, the heat, and the file

Say, in the note you hand over, that public laboratories often buy against a written specification and that the institution's procurement office owns the form. Offer the scientific lines. Do not invent a statute number, a financial-rule clause, or a portal workflow you have not been given. If the building is hot and the goods are temperature-classed, put the receiving check in the scientific lines so the office does not have to guess what "handle carefully" meant. Power cuts belong in the same honest way: if an instrument must restart cleanly, or a freezer must hold temperature through an interruption the building actually has, write the behaviour you will test. Do not write a story about a typical outage.

What to send with the enquiry

Send three columns, even if the final form looks different: mandatory performance, example if you have one, and the equivalence test in a sentence. Add the document set and the acceptance test. Mark desirable lines as desirable. Route the science through laboratory procurement when you want it read as a specification, and through academic research when the buyer is a university group. Use contact or a quotation request to place the file with a person. A scope can be discussed. The office still issues whatever competition the institution uses. Your job is to make the scientific pass mark something more than one responsive bidder could meet, and something you can still explain a year later.