Scheduling Flashcards
Are effort and time measured in the same units?
No,
Effort = person-days or person-months
Time = days or months
Converting between person-days to days equation
T = E / N
What do letters mean
T is time
E is effort
N is number of people
Does relationship of T= E/N E and T hold in general?
No, because some people can not work on task at same time (screwing in lightbulb)
Very small tasks can only be worked on by one person at a time
Relationship only applicable for N= 1
Larger values of N the benefit of additional people declines and ultimately become negative
If all tasks can be done at same time, how long will project take?
However long the longest task will take
If all tasks depend on each other, how long will project take?
Sum of the times required for each task
Tha amount of time required to complete a project depends on what two things?
Effort required for each task
Dependencies between tasks
Basic data needed to calculate time required to complete a project:
Duration = time required to complete each task Dependencies = which task must be completed before a specific task can be started
How should tasks be numbered?
Lower numbered tasks should not depend on higher numbered tasks to ensure no dependency cycles
A task that has no duration
dummy task
The tasks that determine the minimum amount of time required to complete the project
critical tasks
The amount of time that a task can slip without the project falling behind
Slack/Float
Critical tasks involve the calculation of…..
slack
Chart where tasks are represented as rectangles and dependencies re represented as arrows
Gantt Chart
How to find the critical task using Gantt Chart
Work backwards from the task with the latest finish time, Then, the predecessor that is part of the critical sequence is the predecessor that itself has the latest end time
How is slack represented in Gantt Charts
Straight horizontal lines
