You are working on a project where the business objective is to increase sales revenue. With which CRISP-DM process model stage would you start?

Question

Options

• AData Preparation
• BData Understanding
• CEvaluation
• DBusiness Understanding

• A
  1% (1)
• B
  3% (2)
• C
  90% (60)
• D
  6% (4)

Explanation

There appears to be an error in the provided answer key. The marked correct answer (C: Evaluation) is incorrect - the right answer is D: Business Understanding.

Why D is correct: CRISP-DM is a sequential process that always begins with Business Understanding. This phase defines the business objective (e.g., "increase sales revenue"), translates it into a data mining problem, and sets success criteria - without this foundation, no other phase has direction.

Why the distractors are wrong:

• A (Data Preparation): This is phase 3 - you can't clean and transform data until you understand what data you have and why you need it.
• B (Data Understanding): Phase 2 comes right after Business Understanding; you can't explore your data meaningfully without first knowing the business goal.
• C (Evaluation): Phase 5 is near the end of the process - you evaluate whether the model meets the business objectives defined way back in phase 1. Starting here makes no logical sense.

Memory tip: Remember the acronym B-D-D-M-E-D (Business, Data understanding, Data prep, Modeling, Evaluation, Deployment). The process always flows from business goals inward to the data, then outward to deployment - never the other way around. If a question mentions a business goal, the answer is almost always Business Understanding.

Flag for your instructor: The answer key lists C (Evaluation) as correct, which contradicts the CRISP-DM standard. You may want to verify this before the exam.

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