What is included in the service?
Compare test scope, travel, sampling, documentation, out-of-hours access and potential retesting. The most useful proposals identify the building, facility, equipment or order profile, an explicit desired outcome, access constraints and expected deliverables. Require a written boundary between included work, optional changes and excluded conditions.
Where requirements come from
ISO 14644-1 defines particle cleanliness classification; ISO 14644-3 covers test methods. For sterile drugs, ISO classification is not a substitute for all FDA cGMP requirements.
Scope checklist
- Define ISO class and occupancy state. Provide your known measurements and observations.
- Specify room-by-room test matrix. Require a consistent scope of work for each bidder.
- Confirm equipment and calibration. Ask for qualifications, equipment and relevant proof.
- Compare scope and deviations. Specify report format, acceptance and any next steps.
What changes the price?
Costs depend on the number and complexity of work areas, condition and access, location and mobilization, required documentation, schedule, and whether a return visit or additional specialist is needed. Compare itemized bids, not unsupported market averages.
Questions to ask each provider
Which deliverables will you provide? What causes extra charges? Who owns approvals, verification and rework? How will the job affect occupants or operations? Can you provide a sample report or contract scope?
Compare similar services
- ISO Cleanroom Classification — Confirm room list, particle thresholds, sample locations and as-built, at-rest or operational conditions.
- HEPA Filter Integrity Testing — Include installed filter leak testing, relevant airflow parameters and reporting expectations in the request.
- Airflow & Smoke Studies — Specify conditions and scenarios to film, equipment state, acceptance standards and video deliverables.
- Facility Qualification & IQ/OQ/PQ — Distinguish room cleanliness data from equipment qualification, operational qualification and broader validation.