Computer Science Illuminated
6th Edition
ISBN: 9781284055917
Author: Nell Dale, John Lewis
Publisher: Jones & Bartlett Learning
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Expert Solution & Answer
Chapter 12, Problem 42E
Explanation of Solution
Spreadsheet to track project’s activities:
Step 1: Design a spreadsheet as shown below.
The below spreadsheet contains columns like “Start date”, “End date”, “Status”, “Estimated amount”, “Actual amount”, “Slippage”, and “Gain or Loss”.
Screenshot of the spreadsheet
In the above spreadsheet,
- The activities are listed from “D6” to “D10”.
- The start dates are listed in the cells from “E6” to “E10”.
- The end dates are listed in the cells from “F6” to “F10”.
- The statuses of the activities are listed in the cells from “G6” to “G10”.
- The estimated amounts are listed in the cells from “H6” to “H10”.
- The actual amounts are listed in the cells from “H6” to “H10”.
Step 2: Computing slippage for each activity:
Screenshot of the spreadsheet
In the above spreadsheet,
- The slippage for each activity is calculated by subtracting actual amount from estimated amount.
- The cell “J6” contains the formula “H6-I6”.
- The cell “J7” contains the formula “H7-I7”.
- The cell “J8” contains the formula “H8-I8”.
- The cell “J9” contains the formula “H9-I9”.
- The cell “J10” contains the formula “H10-I10”.
After calculating, the spreadsheet looks like the below screenshot.
Screenshot of the spreadsheet
Step 3: Computing Gain or Loss for each activity
Loss or Gain is calculated by using “IF” condition.
Screenshot of the spreadsheet
In the above spreadsheet,
- The cell “K6” contains the formula “IF(J6>0, "Gain","Loss")”.
- The cell “K7” contains the formula “IF(J7>0, "Gain","Loss")”.
- The cell “K8” contains the formula “IF(J8>0, "Gain","Loss")”...
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I need help creating the network diagram and then revising it for the modified activity times.
Activity No.
Activity
Time (weeks)
Immediate Predecessors
1
Requirements collection
3
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Requirements structuring
4
1
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Process analysis
3
2
4
Data analysis
3
2
5
Logical design
50
3,4
6
Physical design
5
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Implementation
6
6
c. Using the information from part b, prepare a network diagram. Identify the critical path.
Given the following Extended-BNF grammar of the basic mathematical expressions:
Show the derivation steps for the expression: ( 2 + 3 ) * 6 – 20 / ( 3 + 1 )
Draw the parsing tree of this expression.
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Chapter 12 Solutions
Computer Science Illuminated
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