4.3.4 Seven steps to project scheduling
Although CPA and PERT are favoured for most project time analysis, many organisations reject them because they often do not indicate the resource analysis (people and equipment) required for the tasks. Therefore, you need to be aware of Precedence Networks and why they may sometimes be preferred. The major difference between Precedence Networks and CPA is that tasks or activities become the focus, rather than milestones.
Table 1 Seven Steps for Project Scheduling (Graham, 1995)
Define the objectives
|
Technical Solution, concept and feasibility of the project with a specification Financial Cost estimates of the proposed solution, itemised and developed into cost budgets Program Displayed on a simple chart, with time frame derived from past project experience |
Divide the project into manageable parts |
Prepare work breakdown lists that define the major areas of work and those departments or people primarily responsible. These areas are sometimes called "work packages" |
Decide in detail what has to be done and in what sequence |
Bar charts for simple projects, CPA network diagrams for more complex programs |
Estimate the duration of each separate activity |
Consider the time that will probably elapse between the start of the activity and its completion. Do not take resources into account at this stage |
Use activity duration estimates to calculate the estimated project duration, and the relative significance of each activity to timescale objectives |
Use a bar chart for very simple projects. Use CPA for everything else. If the results are unacceptable, change the network, the estimates or the time frame |
Reconcile the program with the resources that can be mustered |
Use a bar chart for very simple projects. Table resources otherwise on the CPA. Look closely at the network analysis to ensure there is no overlap of resource allocation. |
Assign jobs to individuals by name |
This demands knowledge of the capability of individuals including their technical competence, speed of working, accuracy and special attributes |
The above table indicates how any project manager can undertake basic steps to keep a project on schedule. At the centre of all project management are resources. Resources are not independent of the performance, cost, and time but rather each of these factors depends on the resources available. The most common resource is people and the second most common resource is equipment. In large information technology, construction and engineering projects the scheduling of resources is very complex. In smaller projects where people and equipment are standardised, scheduling resources is part of the entire project schedule.