What is the difference between CPI and SPI?
CPI compares earned value with actual cost. SPI compares earned value with planned value. One can look healthy while the other is at risk.
When does EVM become misleading?
EVM becomes misleading when EV, PV, AC, and BAC are not tied to the same scope, progress rule, reporting date, and currency.
Does EVM replace a project forecast?
No. It is an early warning system. Use it with updated scope, schedule risk, quality risk, and recovery assumptions before making commitments.
Can this replace accounting or legal advice?
No. Business tools are scenario planners. Contracts, taxes, payment timing, accounting treatment, refunds, and legal requirements can change decisions.
What should I do after using a business tool?
Save the assumptions, compare a conservative scenario, and review the result with actual books, contracts, or an advisor before making a high-stakes decision.
Why might another calculator show a different output?
Different tools may use different rounding, assumptions, default rates, methods, formulas, or input timing. Compare the visible method and inputs before relying on the output.