Which two items form the Lean economic prioritization inputs?

• A. Time to market
• B. Cost to implement
• C. Cost of Delay and cost to implement the valuable thing
• D. Cost of Delay and time to market

Answer: (C)

In Lean economic prioritization, the goal is to rank work by the economic value delivered per unit of time, which is done through the WSJF approach. The two inputs you use are Cost of Delay and the effort or cost to implement the valuable thing (the job size). Cost of Delay measures the economic impact of delaying work—think lost revenue, missed opportunities, customer dissatisfaction, and increased risk if you wait. The cost to implement captures how much effort, time, or resources are needed to deliver the item. You compute the WSJF score by dividing Cost of Delay by the Job Size, so items with a higher ratio deliver more economic value per unit of time and should be prioritized earlier. Time to market is a factor that influences Cost of Delay, but it isn’t used on its own as an input; the critical pairing is Cost of Delay with the cost or size of implementing the feature.