Why should a consultant be conscious about the number of key performance indicators (KPIs) that...

In Salesforce Consumer Goods Cloud TPM, the KPI Set is the fundamental collection of metrics (Volume, Spend, Profit) used for calculations. While KPI Sets are assigned to templates (like a Promotion Template), the underlying calculation engine (Processing Services) aggregates these definitions at the Sales Org level to build the calculation grid.

Option A is correct because it addresses the architectural constraint: the system must generate a cohesive calculation model (often referred to as the "Big JSON" or calculation payload) that encompasses all the read, write, and calculated fields required for that Sales Org. If a consultant creates an excessive number of KPIs—or complex interdependencies across Accounts, Promotions, and Funds—this payload increases in size.

There are hard limits on the number of KPIs and columns the processing engine can handle efficiently in memory. If these limits are exceeded, users will experience significant performance degradation (slow save times, timeouts on P&L loads) or even calculation failures. Therefore, consultants must optimize the KPI Set by reusing metrics where possible and avoiding redundant definitions, ensuring the total configuration for the Sales Org fits within the platform's scalability guardrails.