Preview

Techniques for Estimating Task Duration in Project Management

Powerful Essays
Open Document
Open Document
1407 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Techniques for Estimating Task Duration in Project Management
TECHNIQUES FOR ESTIMATING TASK DURATIONS IN PROJECT MANAGEMENT
As part of planning a project, tasks are assigned to project team members. Durations for task completion are also specified. Task duration estimation is necessary since it helps in cost and resource estimation. Iranmanesh and Mokhtari (2008), further affirmed the importance of project duration estimation by saying that, estimation of time and cost to complete work in a project and follow up them during implementation are major contributors to success or failure of a project, and hence very salient for the Project Manager. According to Hill, Thomas and Allen (2000), developing accurate estimates of overall project duration and its separate activities, is critical in monitoring and controlling of project. Task estimation is considered as a random variable. Therefore estimating duration of task is an informed or educated guess based on past experience of similar tasks. For complex project, it is very difficult to estimate task duration. Therefore, to make a meaningful task duration estimates, some basic information is essential. This information includes scope document, work breakdown structure (WBS), associated risk, task list, task details, and task dependencies. Schedule risks and the critical path are also essential.
Hill, Thomas and Allen (2000) asserted that, the effectiveness of project management techniques depend heavily on the accuracy of the task duration estimates. Thomas (2010) cited in Wysocki (2009) identified six techniques of task duration estimation. These are as followed: similarity to other activities, historical data, expert advice, Delphi technique, Wide-band Delphi technique, and Three-point technique. He identified the Delphi technique and the Three point techniques as the suitable techniques widely use by project management practitioners. My intention is to discuss these methods and how they were applied in my own experience in managing projects.

Historical data: This



References: 1). Seyed Hossein Iranmanesh, and Zahra Mokhtari (2008) Application of Data Mining Tools to Predicate Completion Time of a Project, Academy of Science: Engineering & Technology, August Vol. 44, p234-239. 2). Hill J. Thomas C. L. and Allen E. D. Experts ' estimates of task durations in software development projects, International Journal of Project Management 18 (2000) 13-21 3).  Wysocki, R.K. (2009) Effective Project Management: traditional, agile, extreme. 5th ed. Indianapolis: Wiley Publishing. (pp. 148-152). 4). Goodman P., A. (1999). Application of cost estimation techniques: industrial perspective. Information and Software Technology;34:379-82. 5). Shepperd M. (1995). Foundations of software measurement.Englewood Cliffs, New Jersey: Prentice-Hall. 6). Kerzner H. (1995) Project Management: a systems approach to planning scheduling and control. New York: van Nostrand Reinhold 7). Franchina T. (2010). The Six Method of Estimating Task Duration. (Accessed: http://projectmanagementforum.wordpress.com/about/) 21/03/2012

You May Also Find These Documents Helpful

  • Good Essays

    ACC 497 Final Exam

    • 2281 Words
    • 11 Pages

    15) A simple diagram that shows estimated completion times versus actual completion times for the various activities in a systems implementation project…

    • 2281 Words
    • 11 Pages
    Good Essays
  • Powerful Essays

    [Replace this text with a high-level estimate of project team size requirements.] * [Consider the number and type of tasks to be performed, and the total effort required to complete them.]…

    • 885 Words
    • 4 Pages
    Powerful Essays
  • Satisfactory Essays

    CMGT 410 Week 4 Resources

    • 508 Words
    • 3 Pages

    Gantt diagram showing duration estimates for all tasks and their sequencing (including precedence relations) and highlighting any critical path(s) arising from task dependencies ultimately determining the minimal duration of a project…

    • 508 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Managerial Statement: The expected duration of the project is 31 working days. Critical Activities are I, J, K, L, and M.…

    • 678 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    How can I identify which project activities are “critical” and which ones have “slack”?  How do you confidently estimate a project duration when nothing similar has been done before?  How can I determine the cheapest way to “speed up” a project?…

    • 5350 Words
    • 1 Page
    Satisfactory Essays
  • Satisfactory Essays

    One of the most important factors to the success of a project is how well the project is estimated, as well as how overall costs are managed during the execution phase by the project manager. Project costs and estimates are vital to the success of any organization to remain competitive in the market. Cost estimating for organizations rely heavily on resources that can sometimes be difficult to obtain. Forecasting and utilizing historical return costs are just a couple of ways that organizations rely on estimating. Experienced planners are often a sought trade within the market; this paper will discuss some often used project cost estimating techniques.…

    • 746 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Week Dqs

    • 274 Words
    • 2 Pages

    Accurate estimates are critical to effective project management because having accurate time and costs estimates helps ensure the project is a success. Project control is dependent on accuracy of estimates, time and cost, estimates are major inputs to project planning. Estimates are used to support good decisions to determine project duration and cost. Used to develop time phased budgets and estimating helps reduce error. Project managers can take steps to improve the accuracy of estimating projects by using techniques to scope, constrain and plan the projects conditions, this will help reduce risks, and increase the project’s success.…

    • 274 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    In the book of John, the author said, “We must work the works of him who sent me while it is day; night is coming, when no one can work” (John 9:4, ESV). In biblical worldview, many scriptures identify time and work related approaches. Project duration is an important aspect of the project. Klansek, U., & Psunder, M. (2008) stated, “Each activity within project network is characterized by its precedence relations, duration, and resource requirements”. After doing Part 1 of the Red Zuma project, I realized that many factors can affect the project duration. For example, if the resources are overallocated they can get leveled. When resources get leveled within the slack it can cause changes in areas such as the critical path and duration. It is…

    • 317 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    I believe the poor estimation and scheduling is the major cause of failures in many projects. As project manager the major concern is to collect accurate estimate and develop a schedule to meet the project timeline. In many projects during estimation phase the scope is defined but each stakeholder might have high level tasks defined but not enough detail to provide an accurate time estimate. Any wrong estimation for any process or group would affect the whole project. The article describes the estimation process as iterative refinement and develop estimate-convergence graph which would be a good…

    • 363 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Duration of a project's terminal element is the number of calendar periods it takes from the time the execution of element starts to the moment it is completed.…

    • 906 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Zuma Project

    • 1253 Words
    • 6 Pages

    If the project is not resource constrained, then the finish date of the project will be 12/22/2008,…

    • 1253 Words
    • 6 Pages
    Good Essays
  • Powerful Essays

    Resource Allocation Paper

    • 2410 Words
    • 10 Pages

    Project management is the discipline of defining and achieving targets while optimizing the use of resources: time, money, people, materials, energy, space, etc., over the course of a project. The most important resources that project managers have to plan and manage on day-to-day basis are people, materials, equipment and working capital. Obviously, if these resources are available in abundance then the project could be accelerated to achieve shorter project duration. On the other hand, [Avoid using colloquial language, slang or jargon in formal writing (14)] if these resources are severely limited, then the result more than likely will be a delay in the project completion time. Depending on the type of resources, the costs of providing an abundance of such resources to accelerate project completion time can be very high. However, if resources are readily available and excess premiums are not incurred to use them on the project, then project cost should be low, as some project costs are resource related while others are likely to be time dependent.…

    • 2410 Words
    • 10 Pages
    Powerful Essays
  • Powerful Essays

    Chunnel Project

    • 9442 Words
    • 38 Pages

    Kerzner, H. (2003). Project management: A systems approach to planning, scheduling and controlling (8th ed.). New York: John Wiley & Sons.…

    • 9442 Words
    • 38 Pages
    Powerful Essays
  • Good Essays

    In some situations project manager will have to get the project schedule shortened. One method for accomplishing this is by shortening the durations of the activities in the critical path. This can be done by allocating more resources to perform the activities or by making changes in the scope. Project Crashing and Fast Tracking are two methods useful for shortening the project schedule.…

    • 675 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    The Trophy Project

    • 5219 Words
    • 21 Pages

    Bibliography: Kerzner, H. 2009. Project Management: A Systems Approach to Planning, Scheduling, and Controlling. 10th edition. [eBook]. Canada: John Wiley & Sons.…

    • 5219 Words
    • 21 Pages
    Powerful Essays

Related Topics