Resource Management Chapter 12 Copyright 2010 Pearson Education

Resource Management Chapter 12 Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -1

Types of Constraints q Time q Resource q Mixed Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -2

Resource Loading The amounts of individual resources that a schedule requires during specific time periods. Resource loading table Resource Name Tom Assign Bids Jeff Work 40 hrs Details 5/5 5/12 5/19 5/26 Work 8 h 32 h Calculate Cost Sue Select Bid Carol PR Campaign 40 hrs 8 hrs Work Work Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 8 h 8 h 8 h 32 h 32 h 8 h 8 h 12 -3

Resource Leveling (Smoothing) A multivariate, combinatorial problem Objectives • To determine the resource requirements so that they will be available at the right time • To allow each activity to be scheduled with the smoothest possible transition across resource usage levels Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -4

Prioritization Rules for Leveling v Smallest amount of slack v Smallest duration v Lowest ID number (FCFS) v Greatest number of successor v Requiring the most tasks resources Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -5

General Procedure for Leveling 1. Create a project activity network diagram 2. Develop resource loading table 3. Determine activity late finish dates 4. Identify resource over allocation 5. Level the resource loading table Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -6

Creating Resource Loading Charts (1/4) Display the amount of resources required as a function of time. 4 B 5 Res = 2 0 A 4 Res = 6 5 D 9 Res = 7 9 E 11 Res = 3 1. Start with a network diagram 4 C 7 Res = 2 Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 11 F 12 Res = 6 12 -7

Creating Resource Loading Charts 2/4 Activity Resource Duration A 6 4 B 2 1 C 2 3 D E F 7 3 6 4 2 1 ES 0 4 4 Slack 0 0 4 LF 4 5 11 5 9 11 0 0 0 9 11 12 2. Produce a table that shows the duration, early start, late finish, slack, and resource(s) required for each activity. Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -8

Creating Resource Loading Charts 3/4 3. Draw an initial loading chart with each activity scheduled at its ES. Resources 8 6 4 A D B 2 C 2 4 F Resource imbalance E 6 8 10 12 Project Days Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 14 12 -9

Creating Resource Loading Charts 4/4 4. Rearrange activities within their slack to create a more level profile. Splitting C creates a more level project. Resources 8 6 4 A B 2 C 2 4 D C F E 6 8 10 12 Project Days Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 14 12 -10

Key Parameters in Multi-Project Environments Ø Schedule slippage Ø Resource utilization Ø In-process inventory Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -11

Prioritizing Resource Allocations in Multi-Project Environments • First come first served • Greatest resource demand • Greatest resource utilization • Minimum late finish time • Mathematical programming Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -12

Copyright © 2010 Pearson Education, Inc. Publishing as Prentice Hall 12 -13