PERT
Program Evaluation Review Estimate (PERT)
Abstract
This paper aims at determining the statistical time of various activities relating to the installation of carpets in offices. The paper looks into the project management and the necessary requirements involved it, an analysis of the implications of project scheduling changes and an evaluation of techniques used in project management in relation to operational requirements and goals of a firm.
E = (O + 4M + P)/6
Activity 1 completion time = 7
Activity 2 completion time = 11.5
Activity 3 completion time = 15
Activity 4 completion time = 17.5
Activity 5 completion time = 22
Activity 6 completion time = 33
Activity 7 completion time = 7
Variance = Variance = [(O-E)² + 4(M-E)² + (P-E)²]/6
Activity 1= 4 6 14 = {(4-7)2 + 4 (6-7)2 + (14-4)2}/6 = 14.5
Activity 2 = 5 12 16 = (5-11.5)2 +4(12-11.5)2 + (16-11.5)2 = -3.5
Activity 3= 7, 15, 23 = {(7-15)2 + 4(15-15)2 + (15-23)2} /6 = -64+8 -64 = -20
Activity 4 = 13 16 28 = {(13 -17.5)2 + 4(16- 17.5)2 + (28-17.5)2}/6 = - 20.5 -9 +110.25 =13.45
Activity 5 = 17 20 35 = ((17-22)2+ 4(20-22)2+ (35-22)2}/6 = -25-16+169 = -21.33
Activity 6 = 20 32 50 = ((20-33)2+ 4(32-33)2+ (50-33)2}/6 = -169-4 + 289 = 19.33
Activity 7 = 5 6 13= ((5-7)2+ 4(6-7)2+ (13-7)2}/6 = -4-4+36 = 4.6
Critical path
Activity 2 starts immediately after Activity 1. Activity 3, Activity 4, and Activity 5 start concurrently after Activity 2. Activity 6 does not start until after Activity 3, Activity 4, and Activity 5 are completed.
A3
15
Start A 1 A 2 17.5 A4 A 6 A 7 finish
7 11.5 22 A5 33 7
Critical path: A1 A2 A5 A6 A7
Early start - A 2
Late start - A 4
Late finish – A 5
Probability if finishing project in 40 or less days
Variance of critical path = 13.6 > 40-/13.4= 2.9
Project management refers to a process that involves the application of skills, knowledge, techniques and tools to various project activities so as to meet the set requirements. It is an art or science of organizing various components of a given project, and consists of new product development, launching a new service and such endeavors. It is normally a onetime activity which is temporary and specific. In essence, it is a discipline concerned with planning, organizing and controlling resources to attain specific goals and objectives. Project management requirements comprises of both the functional and operational requirements (Hill, 2009). Functional requirements refer to those requirements that involve the quality of a project and operational requirements are the requirements that involve using the results of a project. These requirements relates to the various resources which are required in the completion of a given project and involves the human resources , financial resources and other requirements which are necessary in the completion of a given project. The project manager has to look into how many people are required to handle the activities of the project, the amount of expenses involved in the completion of this project and the materials if any, which are needed for the purpose of completion of this project. A project manager will also identify the various constraints and limitations which relates to the resources, budget and the scope (Hill, 2009). Time is also an essential aspect of resources that needs be addressed by project management since it can affect how other resources are management in the implementation and commissioning of a project. Essentially, changes in the schedule can lead to an increase or decrease of total time to be used for implementing a project where there is deletion. A change in the schedule can be cardinal, in that it is beyond the scope of the project being undertaken so that it changes the whole character of the work to be done in the project. Such a change may have a great influence on the activities of the project, resources to be used and the overall objective of the project (Hill, 2009).
Project scheduling involves ensuring that activities in a project are carried out on time and the project is kept on time. This includes various techniques which are used in estimating time things will take, planning accordingly and keeping everything on the right track. Any change introduced in such schedules can affect all the factors in the project and this will eventually affect the performance of the project. This will in turn influence the perceptions and satisfaction of various stakeholders such as the expansion of the scope can lead to an increase in amount of work or activities, and will affect the cost involved. For the project to succeed, changes in schedule may require, the manager to recognize them, evaluate the effect of such changes and ensure the project team members are informed of such changes. Project management techniques assist business managers and management team to determine the various project goals, and developing realistic approach in the achievement of project goals (Badiru, 2007).
References
Hill, M. (2009).The Complete Project Management Methodology and Toolkit. CRC Press. 75-77
Badiru, A., (2007).Industrial Project Management: Concepts, Tools, and Techniques. CRC Press. 4-5
