OBM common mistakes
OBM · Understand the traps and how to avoid them.
When asked to evaluate a strategic decision, the candidate lists SWOT factors without linking them to the firm's specific competitive position or recommending a course of action.
Candidates memorize SWOT as a checklist and treat the exam as a recall test rather than an application task; they default to describing tools instead of using them to analyze the scenario.
What to do instead
Before writing, identify the decision the firm faces and the key uncertainty. Use SWOT only to select and justify a specific recommendation (e.g., 'Given the firm's strong brand but weak distribution, it should pursue a partnership rather than direct expansion'). Practice converting each SWOT point into an implication for action.
When analyzing motivation or team performance, the candidate names a theory (e.g., Maslow, Herzberg) but misapplies its constructs to the scenario, such as labeling a hygiene factor as a motivator or ignoring the theory's boundary conditions.
Candidates learn theory labels and definitions but not the distinctions among constructs or the conditions under which each theory applies; exam pressure leads to pattern-matching on keywords rather than careful reading of the scenario.
What to do instead
For each major theory, memorize a one-line decision rule (e.g., 'Herzberg: pay and working conditions prevent dissatisfaction but do not motivate; recognition and achievement motivate'). Practice sorting scenario details into the correct construct before selecting an answer, and note when a theory does not apply (e.g., Maslow's limited empirical support).
When calculating a marketing metric such as market share, customer lifetime value, or break-even for a campaign, the candidate uses the wrong base (e.g., divides by total market instead of served market) or omits a cost component.
Candidates rush to plug numbers into a remembered formula without defining the denominator or checking units; they also confuse similar metrics (market share vs. share of wallet).
What to do instead
Write the formula and define each term before calculating. For market share, explicitly state whether the base is total market, served market, or segment. For CLV, list all cash flow components (margin, retention rate, discount rate) and check that units are consistent. Do a sanity check on the magnitude of the answer.
When computing financial ratios or interpreting financial statements, the candidate mixes up numerator and denominator (e.g., current ratio vs. quick ratio) or uses average vs. ending balances inconsistently.
Candidates memorize ratio names without understanding the underlying concept; they also fail to read the question's instruction on which balance to use (ending vs. average).
What to do instead
For each ratio, write a plain-English definition (e.g., 'current ratio = current assets / current liabilities; quick ratio excludes inventory'). Before computing, underline whether the question specifies average or ending balances. After computing, interpret the result in one sentence to confirm it makes sense.
When solving an operations problem (e.g., EOQ, capacity, queuing, or process analysis), the candidate applies a formula without checking whether the assumptions hold (e.g., using EOQ when quantity discounts apply, or ignoring setup time in capacity).
Candidates treat formulas as universal and skip the assumption-check step; they also overlook units (e.g., annual vs. daily demand) and the effect of variability.
What to do instead
Before applying a formula, list its assumptions and verify them against the scenario. For EOQ, check for quantity discounts and adjust using the total cost approach. For capacity, include setup time and downtime. Convert all units to a common time basis and state the basis in your answer.
When analyzing elasticity or pricing, the candidate confuses price elasticity of demand with income elasticity or cross-price elasticity, or misinterprets the sign (e.g., treating a negative cross-price elasticity as complements when it indicates complements only if negative).
Candidates memorize definitions without practicing sign interpretation; they also fail to distinguish between elasticity along a demand curve and shifts of the curve.
What to do instead
Create a sign-and-magnitude table for each elasticity type: price elasticity (negative for normal goods; elastic if |E|>1), income elasticity (positive for normal, negative for inferior), cross-price (positive for substitutes, negative for complements). For each problem, identify which elasticity is relevant before calculating, and interpret the sign in context.
When answering a business law or ethics question, the candidate identifies the correct legal rule but fails to apply it to the specific facts, or ignores a competing ethical framework that the question asks them to consider.
Candidates treat law and ethics as separate recall subjects and default to a single framework (e.g., utilitarian) without recognizing when the question requires a deontological or virtue-based analysis; they also skip the fact-application step.
What to do instead
Use a two-step template: (1) state the legal rule and apply each element to the facts; (2) if ethics is asked, explicitly name the framework (utilitarian, deontological, virtue, justice) and show how it leads to a conclusion. Practice identifying which framework the question demands from keywords like 'consequences,' 'duty,' or 'character.'
When interpreting business analytics output, the candidate confuses correlation with causation, ignores base rates, or misreads a p-value as the probability that the null hypothesis is true.
Candidates lack statistical literacy and rely on intuitive but incorrect interpretations; they also fail to consider sampling bias or confounding variables in the scenario.
What to do instead
Memorize correct interpretations: a p-value is the probability of observing data at least as extreme assuming the null is true, not the probability the null is true. For any analytics question, ask: What is the base rate? Is the sample representative? Could a third variable explain the association? State these checks explicitly in your answer.
When evaluating an innovation or entrepreneurial opportunity, the candidate focuses only on the idea's novelty and ignores feasibility, market validation, and the business model's unit economics.
Candidates are drawn to exciting ideas and treat innovation as creativity rather than a disciplined process; they also skip the financial viability check because it requires integrating multiple domains.
What to do instead
Use a structured screen: (1) desirability (customer pain and willingness to pay), (2) feasibility (technical and operational), (3) viability (unit economics, break-even, funding needs). For each opportunity, write one sentence per dimension and flag any dimension that is unproven. Practice calculating a simple unit economics example (price minus variable cost, contribution margin).
When a question spans domains (e.g., a strategic decision with financial and HR implications), the candidate answers from only one domain and ignores the others, producing an incomplete recommendation.
Candidates study domains in silos and default to their strongest area; they also fail to read the full question to identify all required perspectives.
What to do instead
Before answering, underline every domain keyword in the question (e.g., 'cost of capital,' 'employee resistance,' 'supply risk') and list the domains involved. Structure the answer with a heading for each domain, then synthesize into a single recommendation. Practice integrated case questions that require at least three domains.