Final answer:
The described step is 'Modify the Experiment', which involves reassessing and improving experimental procedures after analyzing data to ensure reliable results.
Step-by-step explanation:
The step being described is Modify the Experiment. This step is part of the scientific method where, after analyzing the data, you determine whether your data is inaccurate or if there were flaws in the experiment. If the answer is 'YES', it indicates that the original hypothesis might not be supported, and therefore, the experimental procedure needs to be reevaluated and rewritten to address any issues before the experiment can be performed again. This is crucial for improving experimental design and obtaining reliable results.