Quality control
INSTA 800 visual quality inspection
Object groups, types of soiling and assemblies
DS/INSTA 800 measures the result — how clean it is AFTER cleaning — not the frequency. The guide shows how to carry out a visual inspection of an inspection unit: the four object groups, the six types of soiling, counting the items and accept/reject against the figures in your own licence.
Define the inspection unit
An inspection unit is an area of up to 100 m² that is inspected as a whole. Divide the total area into units (Discebo's calculator «INSTA 800 inspection units» helps) so that you know how many units need to be inspected.
Inspection unit≤ 100 m²Confirm the agreed quality level
The standard uses 5 quality levels (1 = lowest, 5 = highest), which are chosen according to the room's function — an office typically requires a lower level than a laboratory. The inspection is measured against the level agreed with the customer in the cleaning plan.
Quality level1–5Get the sample size and Ac/Re from the licence
For sampling inspection, AQL (Acceptable Quality Level) is used with an acceptance number (Ac) and a rejection number (Re). These tables are licence-protected by Dansk Standard and are not reproduced in open documents — read the sample size and Ac/Re from your own licence according to the agreed level.
Go through the four object groups
Each room is divided into four object groups that are assessed separately: furniture and fittings, walls, floor and ceiling. Go through the sample systematically, group by group, so that nothing is overlooked.
Object groupsFixtures · walls · floor · ceilingRecord the six types of soiling
On each object group, look for six types of soiling: litter (can be picked up), loose dirt (particles that cannot simply be swept/wiped away), dust (fine layer that can be stirred up), stains (dry/stuck-on soiling), surface dirt (dirt over an undefined area) and accumulations.
Types of soiling6Count joints within 0.5 × 0.5 m
An accumulation is a concentration of the same type of soiling within a defined area of 0.5 × 0.5 m of an object group. Count accumulations separately for each object group — they are included in the assessment alongside the other types of soiling.
Assembly0.5 × 0.5 mApprove or reject
Compare the number of findings with Ac and Re from the licence: if the number is ≤ the acceptance number (Ac), the unit is approved; if it reaches the rejection number (Re), it is rejected. A rejected unit triggers a full re-clean and a new inspection.
Document in the QA log
Record the date, the inspector's name, inspection unit, agreed level, findings per object group/type of soiling, result and corrective action in the QA log. The log is the documentation for the customer and must be available in the event of a complaint.
Source
Based on DS/INSTA 800-1:2018/ret.1:2019 via insta800.dk and Dansk Service Rådgivning; the licence-protected AQL/Ac/Re figures are read in your own licence (Dansk Standard, M338478).