Concept · C:defined-benefit-sensitivity-analysis

Defined benefit sensitivity analysis

Working definition

A conditional recomputation showing how a supplied change in one assumption affects a supplied benefit measure while holding the stated model and other assumptions constant.

On this page
  1. Apply it
  2. Common mistake
  3. Keep the boundary clear
  4. Authority

Defined benefit sensitivity analysis requires a named plan, population, date, and evidence owner. Sensitivity analysis shows how a supplied benefit measure changes when one named assumption changes while the stated model and other assumptions remain fixed. Preserve every condition around the result.

Apply it

A 50-basis-point decrease produces a $20.9 million PBO, versus a $20 million baseline; an increase produces $19.2 million. These points show direction and conditional magnitude.

Common mistake

Do not assume that a one-variable sensitivity predicts the most likely obligation. It is a conditional change under a stated assumption shift, not a probability-weighted forecast. That error would present a conditional scenario as though it were a forecast with assigned likelihood.

Keep the boundary clear

The result is not a probability range, confidence interval, linear interpolation rule, forecast, or rate-selection method. Do not apply it to another plan or measure without support.

Authority

Read ASC 715-20-50-1 for defined benefit disclosures and assumptions. The sensitivity shown here is a bounded analytical exercise, not a required forecast.

Learning objectives

Put the concept to work

Learning level

Apply this concept

  • Explain and apply defined benefit sensitivity analysis within a reconciled employer benefit-plan workpaper using supplied authoritative and actuarial facts.

Learning resources

Choose a lesson, try an application, or inspect the sources behind this concept.

Updated Sep 11, 2026 Review due Dec 11, 2026