A M Water Services Ltd — Integrated Management System

SOP 5.3 Evaluation and Approval of Suppliers & Subcontractors

Issue 4 | 26 September 2026
Document ReferenceSOP_5.3
Issue Number4
Issue Date26/09/2026
Next Review26/09/2027
Approved ByAaron Mason, Director
Controlled ByAaron / Leanne Mason · Sean Ashton

Evaluation and Approval of Suppliers & Subcontractors

ISO 9001:2015 Clause 8.4 · ISO 14001:2015 Clause 8.1 · ISO 45001:2018 Clauses 8.1.4.2 & 8.1.4.3 — Control of externally provided processes, products and services; contractor and outsourcing controls

Procedure overview

A M Water Services engages two kinds of external party and the route differs for each.

Suppliers of products and services — builders’ merchants and aggregate suppliers, plant, tool and vehicle hire, plant and vehicle servicing, and training providers. A trade account is opened by the Director (Finance & Admin) and the supplier is recorded on APP_19 Approved Supplier Register with the category and the scope of what it supplies. From then on the four checks in APP_19 apply: before the first order, at the annual review each September, and at any time an issue arises. There is no questionnaire.

Labour-supply subcontractors and service providers attending an AMWS site — the route in the flow below. FORM_PQQ_01 Pre-Qualification Questionnaire is issued, and it is accepted only with the supporting evidence: public liability insurance, the tickets and cards required for the work, and right-to-work evidence under PROC_R2W_01. The Directors and the HSQE Consultant review it together and record the category of work the party is approved to undertake.

Records of evaluations, supporting evidence and purchase-order history are retained per SOP 4.7.

Engaging a Subcontractor or On-Site Service Provider — Process Flow

Director (MD)
Aaron Mason
Identify Need & Issue PQQ
Identify the need for a subcontractor or a service provider attending an AMWS site
Issue Pre-Qualification Questionnaire (PQQ) to candidate contractor
FORM_PQQ_01
Candidate Subcontractor / Service Provider
External
Submit Evidence
Complete pre-qualification questionnaire
Return the questionnaire with the supporting evidence: public liability insurance, the tickets and cards for the work, and right-to-work evidence
HSQE Consultant & Directors
Sean Ashton
Aaron Mason (MD)
Leanne Mason (Director)
Evaluate, Approve & Monitor
Check the questionnaire and the evidence returned with it
Insurance, cards and right to work all in date?
No
Request improvement actions; re-evaluate, or source alternative supplier
Yes
Establish category(s) of work the contractor is approved to undertake
Add the contractor to the approved list with the approved work category(s)
APP_19 Approved Supplier Register
Confirm to the Director (Finance & Admin) that the contractor may be engaged
File returned PQQ and supporting documents
Hold the insurance certificate, the cards for the work and the right-to-work evidence on file
Re-check insurance and card expiry before any further engagement
Process / Activity
Decision Point
Document / Cross-reference
Approve / Continue
Reject / Improvement

Suppliers of Products and Services — Approval and Monitoring

WhenWhat happensRecord
Before the first orderA trade account is opened by the Director (Finance & Admin) and the supplier is recorded on APP_19 with the category and the scope of what it supplies.APP_19
At every orderThe order states the product or service, the specification, the quantity, and the site and date required. The delivery is checked against the order and the delivery note on receipt.Purchase order and delivery note
Each SeptemberEvery supplier on the register is reviewed against the four checks and the status is confirmed or changed.Supplier Annual Review
At any time an issue arisesAn issue attributed to a supplier is recorded on APP_21 and the supplier is re-evaluated at that point. The review does not wait for September.APP_21

The four checks, the triggers for re-evaluation and what a re-evaluation can decide are set out in APP_19. All four are answered by AMWS from its own purchase records, its experience of the work, APP_21 and the purchase ledger. Nothing is requested from the supplier.

Purchase order discipline — the approved list first, insurance before anyone works on site

A purchase order or work instruction may only be issued to a party recorded on APP_19 Approved Supplier Register or, for labour, on the live approved subcontractor register held by the Director (Finance & Admin).

For a subcontractor or a service provider attending an AMWS site there is a second gate: public liability insurance in date for the period the work will be performed, and the tickets or cards the work requires. The Director (Finance & Admin) checks both before the work is instructed. A subcontractor whose insurance has lapsed is not engaged again until current evidence is provided.

Where an urgent need cannot be filled from the approved list, the insurance and the cards for the work are obtained before any work is instructed and the party is recorded on the register at the same time. The Director (MD) approves the engagement.