Sensitivity analysis can be applied to linear programming solutions by either (1) trial and error…

➤ Why choose trial-and-error versus the analytic postoptimality method?
Trial-and-error gives quick intuition by re-solving the model for specific scenarios. Analytic postoptimality uses the optimal basis, B⁻¹, and formulas to compute exact allowable ranges and dual values. Use trial-and-error for fast what-if checks; use analytic methods when you need precise ranges, shadow prices, or many simultaneous parameter changes.