What does the logging and chamber allowance cover?

Chain of custody forms, chamber log entries, sample labeling checks and physically loading the pull into the stability chambers after preparation.

Why divide by rate times sixty?

The prep rate is samples per minute and the workload is reported in hours, so multiplying the rate by 60 converts it to samples per hour.

Can one team run two pulls in the same window?

Only if their combined workload fits the available hours. Check each pull's capacity use; two pulls at 60% each already need more bench time than one window holds.

How do I estimate the sample prep rate?

Time a representative pull from the first sample out of the chamber to the last entry logged, then divide the sample count by those minutes. Use a typical timepoint, not the fastest.

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Stability Sample Workload Calculator

Estimate the bench time to pull, prepare and load a stability sample set. The total is judged against the available lab hours you enter, with the gap and the share of capacity.

What this calculator does

Stability pull workload from sample count, prep rate and allowance, checked against available lab hours.

Formula used

Base prep hours = stability samples ÷ (sample prep rate × 60)
Allowance hours = base prep hours × logging and chamber loading allowance ÷ 100
Total workload hours = base prep hours + allowance hours
Capacity gap = available lab hours − total workload hours
Capacity use = total workload hours ÷ available lab hours × 100

Inputs explained

Stability Samples to Pull and Prep: Sample units pulled and prepared for this stability pull.
Sample Prep Rate: Samples labeled, aliquoted and logged per minute.
Logging and Chamber Loading Allowance: Extra time for chain of custody and chamber loading.
Available Lab Hours: Bench hours the team can give to this pull.

How to use the result

Best suited to staffing a stability timepoint, planning a launch wave pull, checking a pull against bench hours.
Sample complexity varies, so one average rate hides a slow timepoint with many dilutions. A pull landing near full capacity leaves no room for repeats or instrument trouble.

Common questions

What does the logging and chamber allowance cover? Chain of custody forms, chamber log entries, sample labeling checks and physically loading the pull into the stability chambers after preparation.
Why divide by rate times sixty? The prep rate is samples per minute and the workload is reported in hours, so multiplying the rate by 60 converts it to samples per hour.
Can one team run two pulls in the same window? Only if their combined workload fits the available hours. Check each pull's capacity use; two pulls at 60% each already need more bench time than one window holds.
How do I estimate the sample prep rate? Time a representative pull from the first sample out of the chamber to the last entry logged, then divide the sample count by those minutes. Use a typical timepoint, not the fastest.

Last reviewed 2026-10-01.