Random-stream replay worksheet
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StatMedAnalysis | Downloadable worksheet | 5 November 2026

Verify that a simulation replays from a recorded generator state across the
intended workflow.

Working instructions
Use a small synthetic run. Record the generator implementation, runtime, seed
policy and stream allocation. Save the state immediately before a chosen
operation. Replay that operation in the same supported environment and compare
a short output sequence and a downstream aggregate.

Working record
Save a local copy. Use public, hypothetical or aggregate information.
Project code ____________________   Prepared on ____________________

Runtime and generator type
___________________________________________________________________

Initial seeding procedure
___________________________________________________________________

Stream per task and parallel ordering
___________________________________________________________________

Point where state was captured
___________________________________________________________________

Code version and draw order
___________________________________________________________________

Expected replay sequence and statistic
___________________________________________________________________

Observed sequence and divergence point
___________________________________________________________________

Action after package or runtime changes
___________________________________________________________________

Hypothetical worked case
A fictional simulation inserts a random draw for a diagnostic plot before its
main sampling step. Replaying from the original seed now shifts later draws.
Restoring the state captured immediately before sampling isolates the
difference.

Decision and follow-up
Require an exact match for a deterministic replay in the declared environment.
When algorithms, versions or task ordering change, document the changed stream
and perform the planned statistical validation separately.

Decision _______________________   Date ___________________________
Evidence retained at _____________________________________________
Next action ____________________   Owner __________________________

Official reference checked 5 November 2026
https://docs.python.org/3/library/random.html