CCE4310- Construction Planning and Scheduling Homework #1-Fall 2018 50 Points DU
ID: 1885270 • Letter: C
Question
CCE4310- Construction Planning and Scheduling Homework #1-Fall 2018 50 Points DUE 9/13/18 Provide full answers to following questions. You are encouraged to conduct research outside of what is stated in the text. You will be graded on the completeness of your answers, your ability to effectively argue your points/answers, as well as on professional communications expectations, i.e. spelling, grammar, diction, sentence structure, etc. Introduction (Chapter 1) 1. Why is it often common to use bar charts and precedence (network) diagrams to depict schedules on the same project? What are the advantages and disadvantage of each? 2. Compare and contrast scheduling and planning. Developing a Network Model (Chapter 2) 3. What is the difference between an activity and an event (also called a milestone)? 4. Provide examples of two different types of constraints that may have adverse impacts on a scheduling network Why should many of the constraints be imposed on a network ofter the basic logic network has been completed, rather than incorporating them as the network is being developed? 6. Discuss reasons why multiple network diagrams may be generated for the same project. What are the advantages and disadvantages of maintaining more than one network diagram? 7. Why is the initial schedule really just a best guess estimate rather than a definitive statement on how the project will be completed? 8. Describe several factors that may impact the level of detail used in a schedule.
Explanation / Answer
1. The network diagram shows the interrelationships of project activities. Network diagrams provide a graphical view of the tasks and how they relate to one another. On the other hand Gantt charts give a clear illustration of project status, gives a pictorical view of the length of all activities, timing of various tasks that are required to complete a project, but one problem with them is that they don't indicate task dependencies - you cannot tell how one task falling behind schedule affects other tasks. Hence it is common to use both bar chart and network diagram to depict and clearly show both interdependencies between activities (network diagram) and timing of various tasks that are required to complete a project (using gantt chart).
Advantages of Gantt chart are
Disadvantages of Gantt chart
Advantages of network diagram are
disadvantages of network diagram are
2.
Planning is the act of creating in advance a "a detailed formulation of a plan of action" for achieving certain objectives.
Scheduling is the act of deciding when something will be done, and allocating the time for it. That is it is the process of determining times and dates to achieve specific objectives.
In terms of construction project management, planning is the process of identifying all activities necessary to complete the project while scheduling is the process of determining the sequential order of activities, assigning planned duration and determining the start and finish dates of each activity.
Scheduling can be considered a subset of planning, because most plans include a timeline/schedule for when each step of the plan will be achieved. planning also includes many things outside of scheduling (such as deciding who to work with, tools that will be used, etc).
3.
An activity is the act of doing some task. An activity takes time and consumes resources
An event represents the accomplishment of some task/activity . An event does not consume any time or resource.
4. a. Start No Earlier Than - Schedules the task to start on or after the constraint date. This type of constraint fits well with resource issues. For example, maybe the contractor scheduled to complete this task does not start until a certain date so this task cannot begin until they arrive at the company.
b. Must Start On: Schedules the task to start on the constraint date.
Date constraints increase the complexity of the schedule and reduce the flexibility of scheduling options. Inflexible constraints usually override any task dependencies and restrict a task to a date you choose. For example, a task with a Must Start On constraint for September 30 and a finish-to-start dependency to another task will always be scheduled for September 30 no matter whether its predecessor finishes early or late.
5. Constraints should be imposed on a network after the basic logic network has been completed, rather than incorporating them as the network is being developed because as constraints are imposed in a step by step process, the scheduler will have a better appreciation of the impact that specific constraints have on the project.
6. Multiple network are generate for the same project when the project network is updated from the previous one, it happens when the project schedule deviates from the original schedule. The initial network is kept as baseline schedule and all other schedule created are masuredwith respet to it to find the deviation in the schedule.
7. All the project information required for schedulling may not be available initially when the project starts. All unavailabe information are guessed according to the experience of the scheduler to prepare the intial schedule, hence the initial schedule is just a best guess estimate.
8. the factors that impact the level of detail used in a schedule are
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