One of the importances of project management tasks is to identify the project schedule. If the project dose not meets on time, the whole project will be failed or cause serious affect to the firm. Therefore, scheduling is an important task and needed to be break down all of activities for project time management processes. Project time management processes has six elements, such as Activity definition, Activity sequencing, Activity resource estimating, Activity duration estimating, Schedule development and Schedule control. Creating a network diagram is to find out a critical path, which has zero slack time to go through the project. Now you might wonder how to find out the schedule time line?
I understood that there are two methods for schedule calculation. One is set the date of completion of the project first and adjust the length of each activity. Another one is set a length of each activity first and uses a critical path to find out the completion date of the project. However, the project management course that I took taught me one more method for schedule calculation. I was so impressed. The method is defined activities, sequenced activities, estimated activities resources, set each length of activities and takes a critical path to find out the date of completion of the project and then does the reverse calculation, which uses the network diagram to calculate the latest start and finish date of each activity, and then find out the latest start date of the whole project. Do you think this new method is easy to find out?
This method looks like easy to think of because it is just backward calculation; however, I had never thought of this way for schedule calculation. It is just like a target costing method for accounting. Usually, add up a cost of product and gross profit, and then find out a selling price of the product. A target costing method is establish the target selling price first, then minus the target gross profit to find out the target cost. Nobody thought of the backward calculation as alternative of cost method because an ordinary method was too common and people have got used to it until the target costing made an impact on accounting cost method and realized its effectiveness. You might want to know how apply this to the scheduling?
The target costing is same way of thinking as backward schedule calculation from this Project management course. I was so used to see and calculate the way that I thought its proper, which is set a completion date of the project first and assigns a fair length of duration or add up the activities to figure out the completion date of the project. I thought that these two ways were only choice and no doubt to be able to find alternatives or not even bothered me to think of alternatives. Do you know what this is called?
This is a paradigm. When we are used to do something and do same things over and over, we will not think about any other possibility and effective alternatives. We believe that the existing way is the most effective and only choice. Frequently, these alternatives are better than existing ways because alternatives are found out later than ordinary one and concerned about effectiveness, so it should be a logical and makes more sense to use. Especially when the shift changes from ordinary to new, effectiveness will increase the most. I learned from paradigm that it is important for us not to stick with old way of thinking; we should try new and fresh ideas and accept opportunities from them. Moreover, having a flexible mind to accept new things make a project manager to manage the project effectively and efficiency.
http://en.wikipedia.org/wiki/Target_costing
http://en.wikipedia.org/wiki/Paradigm
http://www.preparepm.com/notes/time.html
http://www.netmba.com/operations/project/cpm/