When such a situation presents itself, you should turn to the old standby concept of brainstorming. Hold a brainstorming session with all employees who perform the process step, and ask each person how long it takes to perform the task. Average the answers to get an estimated or expected cycle time. Add this information into the data box with the EC/T label. Ask employees to operate the value stream and time themselves on how long the task actually takes. Then invite them to update the Current State Map once they have a timed experience.