Answer:
Check: Review the test, analyze the results, and identify what you’ve learned.
Explanation:
The four phases are:
Plan: identify and analyze the problem or opportunity, develop hypotheses about what the issues may be, and decide which one to test.
Do: test the potential solution, ideally on a small scale, and measure the results.
Check/Study: study the result, measure effectiveness, and decide whether the hypothesis is supported or not.
Act: if the solution was successful, implement it
