An experiment charter records what you believe, what you will change, what you will observe and which decision follows. Keep it proportionate to the test. Its value is making results interpretable and preventing success criteria from being invented after the team sees what happened.
State the assumption as a conditional claim
Describe the group, situation, intervention and expected change. “A clearer meeting brief will reduce clarification during planning meetings” is a starting hypothesis, but specify what “clearer” and “clarification” mean for this test. Avoid broad claims about productivity when your observations concern one narrow step.
Explain why this assumption matters to the next decision. Perhaps the team needs to choose whether to adopt a brief format or investigate a different cause of confusion. If no plausible result would change your action, reconsider whether the work is an experiment or simply an implementation already chosen. Both can be legitimate, but they should be described honestly.
Bound the intervention and the comparison
Write what changes and what remains part of the ordinary process. Name the tasks or participants included, the duration and who can stop the test. Choose conditions relevant to the question while avoiding unnecessary risk. If the test depends on unusual assistance, record it rather than presenting that assistance as normal delivery.
Identify what provides context for the result: recent similar tasks, another version or observations before the intervention. A small practical test may not support strong causal inference because tasks and people differ. State that limitation in advance. An honest comparison can still guide a local decision without pretending to establish a universal effect.
Choose evidence and decision rules before starting
Define a few observations that connect directly to the hypothesis. For a meeting brief, you could record missing information, clarification needed before a decision and time spent preparing the brief. Include the burden created by the intervention, since an improvement in one place may shift effort elsewhere.
Write the conditions for keeping, revising or stopping the approach, using thresholds only when you can justify them. Also state how inconclusive results will be handled. Missing observations, unusual participants or changed conditions can leave a test unable to answer its question. That should trigger a considered next step rather than a forced success or failure label.
Assign an observer and decide where evidence will be stored. Check that the collection method is practical during ordinary work, since a measurement nobody can maintain will leave the charter unanswered.
Record departures without rewriting the starting point
During the test, note material changes such as a different participant group, extra training or a shortened observation period. Preserve the original charter alongside amendments. Otherwise colleagues reviewing the result may not know which version was actually tested or which interpretation depends on later adjustments.
At review, compare evidence with the original question and explain the next action. Retain surprising observations and costs as well as desired effects. Keep the charter short enough to use: a page can be sufficient for a modest test. More consequential changes may need additional expertise, safeguards and review beyond what a lightweight experiment document can provide.
Fictional example: a planning-meeting brief gets tested
A fictional scenario to explain the method, not a customer result or a market benchmark.
A fictional team often reopens decisions because participants lack basic context. It writes a charter for using a short brief in five comparable planning meetings. The brief names the decision, available options and unresolved questions. The team plans to record clarification requests, preparation effort and whether a decision can be made.
One meeting unexpectedly involves an unfamiliar topic, so the observer records that difference rather than attributing all confusion to the brief. At the end, the team reviews whether the format is worth refining and whether its preparation burden is acceptable. It does not claim a precise causal reduction in meeting time from five varied meetings. The scenario and count are invented to illustrate an interpretable local test, with an explicit boundary around the conclusion.
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A practical next-step checklist.
- Write the assumption and the decision it supports.
- Specify intervention, participants, duration and stopping authority.
- Choose observations that include the intervention’s burden.
- Agree keep, revise, stop and inconclusive paths in advance.
- Preserve the original charter when conditions change.
Common questions.
Does every small change need a charter?
No. Use one when uncertainty and later interpretation justify it. A few clear sentences may be enough for a reversible local trial.
Can we change the experiment after it starts?
Yes, when needed, but record what changed and why. Reconsider what the revised test can establish instead of evaluating it against a silently rewritten hypothesis.
Further reading & source context.
These primary references provide background. They are not evidence for the fictional example above and do not endorse AccelerateLink.
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