ms project: resource allocation & levelling
TRANSCRIPT
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MS Project: Resource allocation & levellingS13
L A R A T O O K E Y
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Project network times are not a schedule until resources have been assigned.◦ The implicit assumption is that resources will
be available in the required amounts when needed.
◦ A new projects requires making realistic judgments of resource availability and project durations.
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Resource PlanningDetermining what resources will be
required (labour, equipment, material)
What quantity for each resource will be required.
When are resources available to perform project activities.
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40 hrs
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Resource Histogram
Resource ZZZ
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Resource HistogramA bar chart showing the amount of time
assigned to a resource for the time interval.
Resource availability is depicted as a line for comparison purposes.
Resources assigned more work than available hours are considered “over-allocated”.
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Resource Conflict & BalancingProject calendar:
◦ defines the workable time periods for the project.
◦ defines the workable time periods for the specific resource.
Conflicts in resource availability and schedule activity dates must be resolved to ensure the project will be completed according to accepted project objectives.
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The Resource Problem
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TIME
A project that must be completed by an imposed date◦ Time is fixed,
resources are flexible: additional resources are required to ensure project meets schedule.
RESOURCE
A project in which the level of resources available cannot be exceeded◦Resources are fixed,
time is flexible: inadequate resources will delay the project.
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TimeProjects that must be completed by an imposed
date
Require the use of leveling techniques that focus on balancing or smoothing resource demands by using positive slack (delaying noncritical activities) to manage resource utilization over the duration of the project
◦ Peak resource demands are reduced.
◦ Fluctuation in resource demand is minimized.
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Botanical Garden
FIGURE 8.2
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Botanical Garden (cont’d)
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Resource levelling for TIMEAdvantages
◦ Peak resource demands are reduced.
◦ Fluctuation in resource demand is minimized.
Disadvantages
◦ Loss of flexibility that occurs from reducing slack
◦ Increases the criticality of all activities
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ResourceProjects that involve resources that are
limited in quantity or by their availability
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Splitting / MultitaskingA scheduling technique use to get a better
project schedule and/or increase resource utilization
◦ Involves interrupting work on an activity to employ the resource on another activity, then returning the resource to finish the interrupted work
◦ Is feasible when startup and shutdown costs are low
◦ Is considered the major reason why projects fail to meet schedule
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Splitting/Multitasking
FIGURE 8.10
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Resource LevellingIdentifies under-allocated resources
Different methods for resource leveling
Project Manager analyzes effects on project objectives (time and cost) for resolving resource conflict.
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Resource levelling methods
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1. Do Nothing if over-allocation is within acceptable limitsSchedule/Time Impact
◦ None
Resource/Cost Impact◦ None
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2. Delay non-critical tasks within available floatSchedule/Time Impact
◦ None
Resource/Cost Impact◦ None (except for inflation effects)
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3. Extend non-critical task durations within the available float
Schedule/Time Impact◦ None
Resource/Cost Impact◦ None (except for inflation effects)
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4. Add / Substitute resource of equal or greater capabilitySchedule/Time Impact
◦ May need to consider learning curve for new resource. (Duration may shorten if resources are added – schedule crashing)
Resource/Cost Impact◦ Cost impact if substitute resource has higher costs
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5. Delay Critical Path tasksSchedule/Time Impact
◦ Schedule impact equal to the delay
Resource/Cost Impact◦ Cost impact due to project time extension and
inflation costs
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6. Extend Critical Path task durationsSchedule/Time Impact
◦ Schedule impact equal to the delay
Resource/Cost Impact◦ Cost impact due to project time extension and
inflation costs
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7. Authorise OvertimeSchedule/Time Impact
◦ Could shorten schedule (schedule crashing)
Resource/Cost Impact◦ Cost impact due to premium cost rates
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8. Split the task into non-sequential piecesSchedule/Time Impact
◦ Schedule impact if part of task extends beyond float (soft logic)
Resource/Cost Impact◦ Cost impact due to project time extension and
inflation costs and inefficiencies in splitting task
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9. Modify the ScopeSchedule/Time Impact
◦ Could shorten schedule due to less work or quality of work being accomplished.
Resource/Cost Impact◦ Could go either way.
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