Chapter 7 Schedule Control



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Short Answer/Problems
34. During each reporting period what two kinds of data or information need to be collected?
ANSWER:

Data on actual performance. This includes the actual time that activities were started and/or finished and the actual costs expended and committed.


Information on any changes to the project scope, schedule, and budget.
35. Describe the four steps to schedule control.
ANSWER:

a. Analyzing the schedule to determine which areas may need corrective action

b. Deciding what specific corrective actions should be taken

c. Revising the plan to incorporate the chosen corrective actions

d. Recalculating the schedule to evaluate the effects of the planned corrective actions
36. When analyzing a path of activities that has negative slack, what two kinds of activities should you focus on?
ANSWER:

a. Activities that are near term (that is, in progress or to be started in the immediate future).

b. Activities that have long estimated durations.
37. Describe 4 approaches to reducing the estimated durations of activities.

ANSWER:


a. Apply more resources to speed up an activity (this doesn’t always work).

b. Assign a person with greater expertise or more experience to perform or help with the activity.

c. Reducing the scope or requirements for an activity


  1. Increasing productivity through improved methods or technology

38. Name at least 6 changes are common during IS development projects.


ANSWER:

a. Changes to input screens

b. Changes to reports

c. Changes to on-line queries

d. Changes to database structures

e. Changes to software processing routines

f. Changes to processing speeds

g. Changes to storage capacities

h. Changes to business processes

i. Changes to software resulting from hardware upgrades or, conversely, hardware upgrades resulting from the availability of more powerful software




  1. Based on the following table, calculate the ES, EF, LS, LF times and slack for each activity assuming a expected completion time of 16 weeks. Can the project still be completed on time? If necessary, identify the activities you would concentrate on to get the project back on schedule.


Activity Estimated Time Actual Finish Time Immediate Predecessor

A 3 4 -


B 3 6 -

C 4 A


D 5 A

E 6 B


F 7 C,D,E
ANSWER:
Activity Time ES EF LS LF Slack Actual Finish

A 4


B 6

C 4 4 8 5 9 1

D 5 4 9 4 9 0

E 6 6 12 3 9 -3

F 7 12 19 9 16 -3
To get the project back on schedule, a combined total of 3 weeks must be cut from activities E and F.
40. Based on the following table, calculate the ES, EF, LS, LF times and slack for each activity assuming a expected completion time of 145 weeks. Can the project still be completed on time? If necessary, identify the activities you would concentrate on to get the project back on schedule.
Activity Time Actual Finish Time Immediate Predecessor

A 15 15 -

B 20 45 A

C 40 65 A

D 20 85 B, C

E 10 D


F 10 E

G 25 F


H 20 F

I 15 G, H


ANSWER:
Activity Time ES EF LS LF Slack Actual Finish

A 15


B 45

C 65


D 85

E 10 85 95 85 95 0

F 10 95 105 95 105 0

G 25 105 130 105 130 0

H 20 105 125 110 130 5

I 15 130 145 130 145 0


At this point the project can still be completed by 145 weeks. Attention should stay focused on E, F, G, and I.

TB11–

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