Quick Answer
A construction firm's non-conformance register (RNC, Rapporto di Non Conformità) is a table with one row per non-conformance: where it happened, which document it fails to match, who saw it, what was done on the spot, why it happened, which corrective action, who owns it and by when, and whether it worked. Clause 10.2 of ISO 9001 asks the firm to evidence the nature of each non-conformance, the actions taken and the results of corrective action. Those columns are the evidence. A spreadsheet can hold them, as long as someone fills it in on site.
- ISO 9001:2026. ISO published the new edition on 16 September 2026. It replaces the 2015 edition and keeps the ISO Harmonized Structure, where clause 10.2 "Nonconformity and corrective action" has shared numbering, title and core text.
- Correction is not corrective action. Correction removes the detected non-conformance; corrective action removes its cause. The register needs both, in separate columns, plus a check for similar non-conformances elsewhere.
- Automate supplier non-conformances first. They start from a document, the delivery note, and comparing it with the purchase order is a rule. A model is only needed to read the delivery note.
Managing Non-Conformances at Construction Sites: From Excel to Digital Systems
The RNC is how a certified construction firm records what on site does not match the drawings, the specification, the purchase order or a technical standard, and shows how it was handled. In many firms it lives in an office spreadsheet and a printed form in the site manager's van. The spreadsheet is not the problem. The problem is the work between the columns: entries written up at the end of the week from memory, photos left on a phone, corrective actions with an owner but no reminder.
What ISO 9001 asks for
Under the Harmonized Structure core text of clause 10.2, when a non-conformance occurs the organization reacts to it (controls and corrects it, deals with the consequences), evaluates whether action on the causes is needed, including whether similar non-conformances exist or could occur, implements the actions, reviews their effectiveness and changes the management system if necessary. Corrective actions must be appropriate to the effects. Root cause analysis is therefore not mandatory for every entry: the official guidance to the Harmonized Structure notes that finding or eliminating the cause is not always possible, feasible or cost-effective. Management review (clause 9.3) must consider trends in non-conformances and corrective actions.
The register columns
NC number, date and time, job and site, work phase and location, origin (internal, subcontractor, supplier, client, works supervisor), requirement not met, description, severity, detected by, evidence, immediate correction, decided by, cause, similar non-conformances checked, corrective action with owner and due date, effectiveness check, status. The Italian version of this article walks through each column and a completed example row.
Where to start automating
Supplier non-conformances on delivered materials. Reading the delivery note is the one step that needs a model. Comparing it with the order, opening a pre-filled register row, sending the complaint, chasing replies and counting non-conformances per supplier for re-evaluation is ordinary software on top of the existing ERP. The decision to reject or accept under concession, and the signature, stay with a person.
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Edilizia14 min2026-03-30
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