2011-2016 examen Flashcards
(165 cards)
Discuss the relevance of the statement: “You do not know the final scope of a project until it has been completed”.
A project is always new to an extent, which means that the scope often is adjusted. The adjustments can be both small, within the initially approved cost and time constraints, or large, with adjusted time and cost constraints. However, this does not mean that we do not need to define the scope initially. We should always make our best to define the scope as complete and accurate as possible at the start of the project.
What is a projects life cycle?
The life cycle is the set of phases a project goes through from start to finish:
- Initiation and definition
- Planning and development
- Execution and control
- Closure
Team building is an often-used tool to improve collaboration in a project. Discuss strengths and weaknesses with this tool including what one would like to achieve and likely obstacles.
Strengths:
- Creates work motivation among team members
- Creates a sense of team spirit; one-ness and cohesion among team members, belonging, identity
- Enhances relations and communication, reduced conflict; enables easier conflict resolution
Improves awareness and commitment to project goal and sub goals
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Weaknesses:
- May make team one-eyed
- Teambuilding efforts take time and cost money
Poor planning is often regarded as the main reason for an unsuccessful project. Why?
Planning is the basis for:
- Justifying the project through a feasibility study – decision to invest. Unsuccessful if project is started without proper justification.
- Defining it within the constraints on time/scope/cost.
- How to meet risk and handle change.
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If the above is not properly addressed, there is increased likelihood of not meeting the scope, and/or exceeding cost or time. Poor planning is a reoccurring problem because:
- Planning takes time and money, and is therefore often insufficiently done.
- Learning from previous projects is often insufficiently done.
What is the purpose of and what are the main components in a change order system?
The purposes of a change order system are
- To influence the factors that create change
- To determine that a change has occurred
- To manage the change as and when they occur
The main components/elements in a change order system are
1. Identifying change
2. Analyze the effects of the change
3. Develop a response strategy
4. Communicate the strategy and gain acceptance
5. Revise the project plan
Should one expect cost overruns in a project? Why or why not?
Yes, one must always expect deviations from the plan. The plan is based on uncertainties. Small overruns may happen throughout the project due to changes, but they should be detected early so that consequences to the plan could be projected. However, appropriate control has the intention to adjust plans (update estimates). If the adjustments are approved, there should not be an overrun.
What characterizes a well-designed WBS (Work Breakdown Structure) and what implications do the structure of the WBS have for estimation and control in the project?
The WBS covers the entire amount of work to be done in a project. Characteristics of a well-defined WBS is that the structure is broken down in units and sub units until
- the end of every branch represents a well-defined unit of work (“work package”)
- it can be carried out in a reasonable time
- by a single unit (person or team) of manpower resources
Each work package may contain several activities assigned to the person or team.
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Implications of the WBS:
- Makes estimation easier
- Makes control easier, because
- - - it makes it clear who is responsible for doing what
- - - the work is well-defined
- - - - - - - - in scope; can be determined whether it is completed
- - - - - - - - in time; can be determined if it is done in time
- - - - - - - - in cost; can determine if it is done within budget
- Completion at higher levels can be calculated by summing the amount of work at lower levels
Discuss the design of the work breakdown structure (WBS) in a project. Emphasize coding system, use of the WBS during estimation of project cost and duration as well as the use of the WBS during project execution.
A Work Breakdown Structure is a top-down, deliverable oriented representation of all areas of work involved in a project. It can be represented diagrammatically or as a structured task list. The WBS is an important communication tool in the planning phase of a project, as it helps visualizing the work content and project deliverables. It creates a common understanding of the project. The lowest branches of the structures are work that can be done by a single member at a reasonable amount of time.
The WBS is coded using logical series of numbers to represent the level and position of each of the items in the project. The code can be used in other documents, e.g. responsibility allocation, cost allocation, and monitoring and reporting purposes. Each cost represents a unique part of the WBS. The coding is important to ensure the ability to control the project.
The WBS I very convenient in the execution phase of a project, especially when communicating information about different work packages, because there is lower chance of ambiguity, and no need for long work descriptions. It is very clear for the team members to see what is left to do in the project, as the WBS creates what looks like a checklist, with a clear overview of each and everyone’s responsibility.
The WBS can be used as a schedule for team members, where each work package has a certain duration. The cost of each branch is easier to determine when the task is broken down to smaller pieces. The cost of a small activity is easier to find than the cost of a larger activity, and the total cost can be found by taking the sum of all the activities.
what is EVA?
The EVA (Earned Value Analysis) is a good tool to use for controlling the project in the execution phase. The basic principle of EVA is to compare the value of work completed against planned progress and actual expenditure. The main variables used in the EVA relate to planed cost, schedule, actual cost and actual progress.
what is BCWP ?
Value of actual work done, i.e. earned value. This is the value of completed work in terms of the budget assigned to that work. Known as “budgeted cost of work performed” (BCWP)
what is BCWS ?
Value of planned work, planned value or budgeted cost of work scheduled (BCWS)
what is ACWP
Actual expenditure, actual cost of work performed (ACWP).
what is EAC, BAC, VAC & SAC.
EAC = Estimate at completion
BAC = Budget at completion
VAC = Variance at completion
SAC = Schedule at completion
how to calculate variance at completion
VAC = BAC – EAC
Variance at completion = Budget at completion - Estimate at completion
what is SV?
Schedule variance: (SV = BCWP – BCWS)
Schedule variance=budgeted cost of work scheduale-budgeted cost of work performed
Or (SV = EV– PV). Schedule variance = earned value - Planned Value.
To Get in prosent SV% =SV/BCWS or SV%=SV/PV
how do you calculate Schedule variance and what can you conclude whit it?
Schedule variance (SV = BCWP – BCWS) Or (SV = EV– PV). Schedule variance = earned value - Planned Value.
To Get in prosent SV% =SV/BCWS or SV%=SV/PV
- Negative result indicates that the project is behind schedule
- Positive result indicates that the project is ahead of schedule
what is CV
Cost variance (CV = BCWP – ACWP)
Cost variance = budgeted cost of work performed- actual cost of work performed
how do you calculate Cost variance and what can you conclude whit it?
Cost variance (CV = BCWP – ACWP)
- - -Negative result indicates that the project is over budget (cost overrun)
- - - Positive result indicates that the project is under budget
what is SPI
Schedule performance index:
(SPI = BCWP / BCWS)
Schedule performance index = (budgeted cost of work performed / budgeted cost of work scheduled)
Or
(SPI = EV/PV)
Schedule performance index = Earned value / Panned Value
SPI>1 indicates that the project team is efficient in utilizing the time and resoyrses allocated to the project (NB kan være på bekostning av ting som hms så dette er som regel et godt tegn men ikke altid)
SPI<1 indicates that the project team is LESS efficient in utilizing the time and resoyrses allocated to the project
how do you calculate Schedule performance index and what can you conclude whit it?
Schedule performance index (SPI = BCWP / BCWS)
- - - A result smaller than one indicates that the project is behind schedule
- - - A result bigger than one indicates that the project is ahead of schedule
what is CPI
Cost performance index (CPI = BCWP / ACWP)
=>Cost performance index = ( budgeted cost of work performed/actual cost of work performed)
how do you calculate Cost performance index and what can you conclude whit it?
Cost performance index (CPI = BCWP / ACWP)
- - - A result smaller than one indicates that the project is over budget (overrun)
- - - A result bigger than one indicates that the project is under budget
what is the Estimate at completion(EAC)
One event: EAC = BAC + (ACWP – BCWP)
=> Estimate at completion = Budget at completion + (Actual expenditure- the budgeted cost of work performed)
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Several events (lower productivity): EAC = BAC / CPI
=> Estimate at completion= Budget at completion/Cost performance index
how to calculate Schedule at completion
Schedule at completion= (Original estimated duration) /Schedule performance index “SPI”