DM Practice Strategy and Error Analysis

This final lesson in the Decision Making course focuses on how to structure your practice, identify and fix recurring errors, and develop a systematic approach that maximises your DM score on test day. Effective preparation is not about doing more questions — it is about doing questions more effectively.

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The Three Phases of DM Preparation

Phase 1: Learn the Techniques (Weeks 1-2)

In this phase, focus on understanding each question type without time pressure:

Question Type	Key Technique to Master
Logical puzzles	Grid/table setup, constraint elimination
Syllogisms	Venn diagram method, quantifier recognition
Data interpretation	Accurate reading, trend identification
Probabilistic reasoning	Converting to concrete numbers, 2×2 tables
Venn diagrams	Start from centre, verify totals
Assumptions	The negative test
Arguments	Evidence vs emotion, logical flaw recognition
Yes/No items	Independent evaluation, partial credit strategy

Target: Be able to solve each question type accurately (not necessarily quickly).

Phase 2: Build Speed (Weeks 3-4)

In this phase, add time pressure gradually: