Define the loading state, not just its label.
“Empty” and “loaded” are starting points for a discussion, not interchangeable study conclusions. Describe the conditions you need represented and ask your quality team which studies are required. This guide prepares that conversation; it is not an approved protocol, and it does not establish that one loading state can substitute for another.
Request a mapping quoteDescribe each proposed loading state
- What empty means on your site
- Specify whether racks, shelves, pallets or other fixtures remain in place when stock is removed. Provide the corresponding layout and equipment settings. Ask the protocol reviewers to confirm the intended condition rather than relying on the word empty alone.
- What loaded means in the proposal
- Describe the proposed stock arrangement, storage positions and occupied heights. Explain what routine use that arrangement is intended to represent. If substitutes or simulated loads are proposed, ask your quality team to assess and approve their suitability before execution.
- What is not represented
- Identify configurations, occupancy patterns and operating conditions outside the proposed study. Keep unknowns visible. Ask whether the intended decision requires additional loading states; do not assume a convenient or available arrangement is sufficient for every future use of the space.
Plan the transition and the operation
- Stock movement and availability
- Confirm who can move stock, where it will be held and when the area is available. Identify product-protection and access constraints before scheduling. A request for an empty study does not authorize moving products or interrupting their required storage conditions.
- Starting and recording conditions
- Ask the protocol team to define when each study can start, which settings and operating activities apply, and what events staff should record. Confirm collection duration through the approved protocol, separately from the time needed to change the loading arrangement.
- Changes during collection
- Agree how additions, removals, relocated stock and unexpected door activity will be documented. Identify who decides whether a change remains within the approved study conditions or needs deviation review. Keep a record of what was present, not only what was planned.
Set the limits of interpretation
- Separate study records
- Request clear identification of the loading state, layout, settings and operating events associated with each dataset. Confirm how the report distinguishes conditions actually recorded from the intended scenario, so the reviewer can see the basis and limits of each conclusion.
- Comparison with context
- If comparing studies is an objective, identify other differences that reviewers need to consider, such as placement, equipment settings or site activity. Ask who evaluates those differences. Do not attribute a changed result to loading without assessing the surrounding study conditions.
- Quality decisions and follow-up
- Your quality team determines whether the evidence supports the intended use and whether further studies are needed. Neither an empty nor a loaded result automatically replaces the other. Agree separately on corrective work, repeat mapping and authorization to use the area.
Methodology and further reading
WHO distinguishes empty and loaded storage conditions; the protocol defines which conditions the study represents.
- WHO: Temperature mapping of storage areas, Supplement 8 (2015)
- ATEK guide to USP <1079.4>
- ATEK guide to ISPE temperature mapping
These resources inform scoping; they do not determine which requirements apply to your facility. Your quality team confirms the applicable requirements and approves the protocol.
Continue planning your study
Start with the information you have.
Tell us what needs mapping, where the site is and when you need the work. Mark unknown details as unknown. ATEK confirms service availability, scope and scheduling during review.