Management / PAL-EBM / Metrics And Calculations

Metrics And Calculations

3 min read

Senior2 min read

Rapid overview

Metrics And Calculations

TL;DR

The handful of formulas the PAL-EBM exam expects you to compute on paper: ROI as (value − cost) / cost, target velocity from a percentage uplift, the lead-time identity wait + cycle, improvement percentage as (current − target) / current, and market-share revenue deltas. Drill them until the arithmetic is mechanical so you can spend exam time on the framing instead.

How it works

ROI Calculations

Basic ROI Formula

ROI = (Value Delivered - Cost) / Cost × 100

Example: Product delivers $100,000 value with $60,000 cost:

ROI = ($100,000 - $60,000) / $60,000 × 100
ROI = $40,000 / $60,000 × 100
ROI = 66.67%

Velocity Calculations

Velocity Improvement

Target Velocity = Current Velocity × (1 + Improvement %)

Example: Team velocity is 40 story points, aiming for 25% increase:

Target = 40 × 1.25 = 50 story points

Cycle Time Calculations

Cycle Time Reduction

New Cycle Time = Current Cycle Time - Reduction
New Lead Time = Wait Time + New Cycle Time

Example: Current cycle time 20 days, reduce by 25%:

Reduction = 20 × 0.25 = 5 days
New Cycle Time = 20 - 5 = 15 days

Improvement Percentage Needed

Improvement % = (Current - Target) / Current × 100

Example: Current 8 days, target 5 days:

Improvement = (8 - 5) / 8 × 100 = 37.5%

Market Value Calculations

Revenue = Market Size × Market Share %
Additional Revenue = Market Size × (New Share - Current Share)

Example: Market worth $2 million, share from 15% to 25%:

Additional share = 25% - 15% = 10%
Additional revenue = $2,000,000 × 0.10 = $200,000

NPS Revenue Correlation

Example: Each NPS point = $100,000 revenue increase:

NPS increase from 30 to 50 = 20 points
Revenue increase = 20 × $100,000 = $2,000,000

Flow Metrics

Lead Time Components

Component	Description
Wait Time	Time item is in queue (not being worked on)
Cycle Time	Active work time from start to finish
Lead Time	Total time from request to delivery

Lead Time = Wait Time + Cycle Time

Work in Progress (WIP)

Little's Law:

Lead Time = WIP / Throughput

Lower WIP = Lower Lead Time = Faster flow

Quality Metrics

Defect Rate

Defect Rate = Defects Found / Total Units Delivered × 100

Escaped Defects

Escaped Defect Rate = Production Defects / Total Defects × 100

Innovation Metrics

Technical Debt Ratio

Tech Debt Ratio = Time Spent on Debt / Total Development Time × 100

Innovation Rate

Innovation Rate = New Feature Time / Total Development Time × 100

On-Product Index

On-Product Index = Product Work Time / Total Work Time × 100

Higher is better (less time on overhead/meetings).

Sprint Metrics

Velocity Trend

Track velocity over 3-5 sprints for meaningful trends:

Increasing = Improving delivery capability
Decreasing = Potential issues (tech debt, turnover)
Stable = Predictable for forecasting

Sprint Goal Success Rate

Success Rate = Sprints with Achieved Goals / Total Sprints × 100

Quick recall Q&A

Q: If ROI is 66.67%, what does that mean? A: For every dollar invested, the product returns $1.67 (the original $1 plus $0.67 profit).

Q: Why is velocity alone not a good measure of team performance? A: Velocity measures output (story points), not outcomes (value delivered). Teams can game velocity by inflating estimates or reducing quality.

Q: What's the relationship between WIP and lead time? A: Per Little's Law, Lead Time = WIP / Throughput. Reducing WIP directly reduces lead time, improving flow.

Q: How do you calculate the improvement needed to meet a cycle time target? A: Use ((Current - Target) / Current) × 100. If current is 8 days and target is 5 days: ((8-5)/8) × 100 = 37.5% improvement needed.

PAL-EBM Study Portal