The emphasis for controlling costs should focus on compliance with the Transportation Solution Determination Process and provide more notice and lead time to the TMSP for transportation moves so that better planning can occur. Proper planning and coordination can avoid most instances of expedited or air shipments. The Perform Value Chain Mapping and Analysis topic of the Prepare Project task of Postal Service Supplying Practices Process Step 2: Evaluate Sources aids in obtaining these cost reduction measures. Examples of how the item manager can use some factors to improve savings include: