A process making a very complex part has primary processing (w/s 1) and two rework stations in series (w/s 2 and w/s 3) as illustrated below. 1 w/s 1 d + O w/s 2 d2 w/s 3 dz Fallout from w/s 1 goes to w/s 2 and if w/s 2 is not successful in repairing the part is goes to w/s 3. If it cannot be repaired in w/s 3, the part is rejected and leaves the process. A model to determine approximately how many parts (1) must be start to the desired number of output parts (O) is needed. The form of the model is O=k*l. What is the value of k? O (1-d3) O d * d2* d3 O (1-d1) + (1-d2) + (1-d3) O (1-d1) + d (1-d2) + d1d2(1-d3) Od + (1-d1d2 + (1-21)(1-d2d3 It cannot be determined with the information given