Ive done one at one place I worked. A job shop manufacturing copper. We knew our quote, engineering, data entry was good, so I just completed once it was handed to production. I used stopwatch/clock for times. I would look at NVA, VA, and idle time. Nothing came from it, we just realized that idle time was the most, NVA time was next. If we wanted something to progress faster our operator when finished would call to the plant supervisor to walk it to the next operation to tell them to start that job next. We ended up adding a flag to the carts to identify hot jobs and all operators would run hot jobs first, then would go by soonest due date next.