Cost of Delay

Cost of Delay (CoD) is an economic framework for prioritization developed by Don Reinertsen. It answers a simple but powerful question: "What is the cost of delivering this one week/month later?" By putting a dollar value on delay, it transforms abstract prioritization debates into concrete economic conversations. Teams often discover that the order in which they deliver work matters far more than how fast they work.

1. Estimate the value of each item — For each feature or initiative, estimate the weekly or monthly revenue, cost savings, or strategic value it will generate once delivered.
2. Determine the urgency profile — How does the value change with time?

• Standard: Value is constant whether delivered now or later
• Fixed deadline: Value drops to zero after a certain date (regulatory, seasonal)
• Decaying: Value decreases over time (market window closing, competitor catching up)
• Urgent: High cost right now that decreases once resolved (outage, critical bug)

1. Calculate Cost of Delay — For each item, estimate the cost per week of not delivering it. This is your CoD.
2. Use CD3 for prioritization — Cost of Delay Divided by Duration (CD3) = CoD / Duration. Rank items by CD3 score and do the highest-scoring items first.
3. Compare and sequence — The optimal order is almost never "biggest value first" — it's "highest cost-of-delay-per-unit-of-time first."

• Fix the checkout bug first (highest CD3, bleeding money now)
• Then compliance (fixed deadline, high penalty)
• Then enterprise feature (valuable but not time-sensitive)

Cost of Delay helps you prioritize by economic impact, not just value or effort. It reveals that sequencing often matters more than speed, and that small urgent items frequently deserve attention before large strategic ones.