Mari Luukkainen

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Four-phase process

The core operating cycle: Analysis → Hypothesis → Prioritization → Testing. Repeat each cycle consistently.

Last updated: December 12, 2025

Definition

The core operating cycle: Analysis → Hypothesis → Prioritization → Testing. Repeat each cycle consistently.

More context

The four-phase process is a repeatable routine for systematic problem solving. Each phase is required: analysis grounds the work, hypotheses create testable options, prioritization focuses resources, and testing produces learning.

Why it matters

It prevents “random acts of growth” by enforcing a consistent loop that produces learnings and momentum.

How to use it

Run the cycle on a weekly/biweekly cadence, keep the KPI constant within a cycle, and document each phase to make iteration compounding.

Common pitfalls

Skipping prioritization (doing everything), or skipping analysis/learning (repeating the same tests).

Related terms

  • Analysis — The first phase of the four-phase process: analyze the current situation and/or learnings from the previous cycle before forming hypotheses.
  • Hypothesis — A specific, testable statement about what change could improve a KPI. In the process, you typically form 1–3 hypotheses per cycle.
  • Prioritization — The phase where you select what to test next based on likelihood of success, resource intensity (time/money), and scalability.
  • Testing — The focus on running tests where outcomes aren’t known upfront. Testing is executed as part of a repeatable cycle and documented thoroughly.

Related reading

  • Framework: core process
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