Please go over the tasks of Lesson 4 Unit 1 in our course center first. Then fill in the blanks of the following passage with what you know about CPM. * CPM is short for (1)______________________. It is mathematical method to figure out the (2)______________ time needed for completing the project. Some steps are to be followed to carry out CPM for a project: First, to list all the (3)___________ to be done. Second, to work out a logical (4)________________ of all the activities. Third, to work out the (5)____________ that each activity will take. Fourth, to construct a (6)___________ to establish a timescale for the project. The onward calculation of the (7)______ start and finish time help get the (8)________ time for the project, and the backward calculation of the (9)_______ start and finish times show the (10)________ time of each activity. Thus the (11)__________________ is easily shown, because the slack time of the activitis on the critical path is (12)________.