2 week job to completion of a task is ready for delivery. It is more efficient to collect data in one place, and to determine whether there is a relationship or not it is correct.
2 weeks to complete the work efficiency of delivery. Efficient collection of data is the same and it is checked whether the information is relevant or not, and with much accuracy.
2 weeks work effectively to completion of the job ready. Job performance is to collect data on the same and monitoring information that relates whether and how much accuracy