Institutional Procurement: How a University Buys Laboratory Supplies, from Quotation to Payment

A public university or research institute does not simply buy laboratory supplies; it procures them, through a sequence that statute defines and auditors later check. In Kenya the Public Procurement and Asset Disposal Act applies to all state organs and public entities in their procurement planning, procurement processing, inventory, disposal and contract management ^[1]. Ghana's Public Procurement Act, 2003 (Act 663) does the same work there ^[2]. The steps are broadly the same everywhere. A need is planned, a requisition is raised and approved, a procurement method is chosen, quotations are obtained and evaluated, a purchase order is issued, the goods are delivered and inspected, and only then is the invoice paid.

This article is written for both sides of that sequence: the laboratory raising the need, and the supplier waiting to be paid. It covers the institutional process only. Paying a supplier across a border is a separate question, handled in this cluster's article on foreign-currency payments, and passing purchased material on to a partner institution is a transfer governed by a material transfer agreement, not a purchase.

The sequence, step by step

Each step produces a document, and each document is what the next step relies on. The table shows the typical order and what the supplier contributes at each point. Local names vary — a requisition may be called an indent, a purchase order a local purchase order — but the logic does not.

Quotations: the method most laboratory orders use

Most laboratory purchases are small, standard and repeated, which is exactly what a request for quotations is designed for. Kenya's Act allows it where the estimated value is at or below the maximum prescribed in regulations, the goods are readily available in the market, and there is an established market for them ^[1]. Ghana's Act 663 allows it for readily available goods that are not specially produced to the entity's own specification, where there is an established market and the value is below the threshold in its third schedule ^[2]. Ghana's procedure adds a detail suppliers overlook: each supplier may give only one price quotation and may not change it afterwards ^[2].

For the supplier, the quotation is the document everything else is measured against. It should state the specification in terms an evaluation committee can compare, the price and currency, the delivery term under a named Incoterm, the lead time, and a validity date long enough to survive the institution's approval process ^[4]. A quotation that expires while it waits for a signature is the single most common reason an order has to be restarted from the beginning.

Sole-source justification

Research materials often have one realistic source: a specific sequence, a grade matched to earlier work, a supplier whose batch history the laboratory has already validated. Procurement law recognises this, but only as an exception with named grounds. Kenya's Act permits direct procurement where the goods are available only from a particular supplier, or a supplier has exclusive rights in them, and no reasonable alternative or substitute exists; or where additional supplies must come from the original supplier for standardisation or compatibility with what was already bought ^[1]. Two conditions shape the file. Direct procurement may be used only as long as the purpose is not to avoid competition, and a public officer who contravenes the permitted grounds commits an offence ^[1].

Ghana's Act 663 lists the same core grounds and one more of direct relevance to laboratories: a contract with a supplier for research, experiment, study or development, except where it includes producing goods in quantities to establish commercial viability ^[2]. Single-source procurement there requires the approval of the procurement regulator ^[2]. Kenya's procedure for a direct procurement requires a tender document as the basis for negotiation, an ad hoc evaluation committee, the appropriate approvals and a written contract signed by both parties ^[1]. A justification that survives review answers four questions in writing.

• What exactly is required: the specification, not the brand.
• Why no reasonable alternative exists: the market enquiry made, who was asked, and why each alternative fails the specification ^[1][2].
• Where continuity is the ground, what the earlier purchase was and why a different source would compromise comparison with existing results ^[1].
• Why the price is reasonable, with whatever comparison the market allows.

Why payment terms are long, and what that means for a first order

In a public institution, payment is the last step rather than the first. The invoice is paid after the goods have been received, inspected and accepted against the order, and after the payment itself has been approved, so the time from order to payment includes delivery, inspection and an approval queue the supplier cannot see. Laboratory quality guidance treats this receiving and acceptance step as part of the quality system rather than as administration ^[3]. For an imported consignment the interval also includes customs clearance and the foreign-currency process. A supplier used to payment in advance meets a buyer whose rules may not permit it, or permit it only on conditions.

Resolve this before the quotation, not after the order. The supplier should state its terms in the quote; the institution should say whether it can pay in advance, against documents, or only after acceptance, and what security it needs before paying anything in advance. Where neither side can move, a documentary route through the two banks may be the only structure both rulebooks allow. On a first order, build the whole cycle into the lead time, and do not assume the second order will be faster until it has been.

Common causes of rejection

• An expired quotation, or one with no validity date at all.
• A currency, Incoterm or pack unit on the invoice that differs from the purchase order.
• A specification that no longer matches the requisition — often a grade, pack size or purity figure changed by the supplier without a revised quotation.
• One requirement split into several small orders so that each stays under a method's threshold. An auditor reads that as avoiding competition, which Kenya's Act names explicitly ^[1].
• A sole-source file that asserts uniqueness without evidence of the market enquiry behind it ^[1][2].
• Delivery documents missing at inspection — no certificate of analysis, no packing list, no transport document — so the goods cannot be accepted and the invoice cannot be paid ^[3].
• An order placed before approval, which can leave the institution with no lawful way to pay for it.

Keep one file per order

The procurement file and the laboratory's material record are two different things that must point at each other. The procurement file holds the requisition, the method decision, the quotations, the evaluation, the approvals, the purchase order, the delivery note, the inspection record, the invoice and the payment advice. The laboratory record holds what actually arrived — lot, expiry, condition on arrival and storage location, following the batch-level records kept for received material — cross-referenced to the purchase order number. Quality guidance places purchasing and inventory inside the laboratory quality system for exactly this reason: a result that cannot be traced to a controlled purchase is a result that is hard to defend ^[3].

Kept this way, the file also answers the questions an auditor asks years later, when the people who raised the order have moved on: who approved the need, why this supplier, what was agreed, what arrived, and whether what was paid matches what was ordered.