 Hello, I am Mr. Satish Thalangi, Assistant Professor, Department of Civil Engineering, Washington Institute of Technology, Solapur. In today's session, we are going to see the project network updating for the project management. At the end of the session, the students will be able to compare the originally scheduled network diagram of a particular project with the network diagram which is going to be updated using the critical path method for the project management. Now, let's see what is the project updating or you can say the network updating. The network updating is nothing else. It is a process of replanning or rescheduling of the activities in the project on which the particular updating is going to be done or till the what the particular project has been completed and what the progress is there and what the progress is going to be there from the date on which the updating is going to be done. Here, why we have to go for the network updating is what that if there is a change in the plan, we have to go for the updating. If there is a change in the activities and it duration means what if there is addition of some activities or a change in the execution of the particular activity method or you can say means what for it if initially it was somewhat traditionally but now it has been advanced technology has been used for the execution. At that time, the activity may be change or activity are added along with that there will be change in the duration of the activities. Here, the change is due to the major reasons like a climatic condition or you can say the natural climaties or man-made disasters. Here, the man-made disaster may be due to the improper planning of the equipments or tools or you can say the in due to the lack of the safety on the side due to which there may be an accident due to which there may be a delay in the projects for that. We have to go again for the updating whether the scheduled activity is going on track or not other if there is a need to re-planning or rescheduling of the activity, we have to go and we have to observe. Here, the time changes for the updating are what assign the time of the update at which the updating is to be done. We have to assign to the updating project the date on which it is going to be updated. That will be the time the earliest occurrence time of the starting event of the project or the tail event of the activity which is in progress. Allocate or you can say assign the zero time duration for the activities which are already completed. We have to assign the zero for that the activities which are completed and we have to assign the remaining time estimate durations to the activities which are in the progress or we have to change the activity duration as per the requirement of the change requirement. Here, the addition or you can say the whole duration of the activity changes due to some revision or you can say addition of the activity or additional of the new technology in the particular execution of the activities. Here, assign the revised estimate durations to the activity for which the change is proposed. We have to collect all the data from the data information system that what is ongoing activities and what are the completed one and what are going and the activities which are going to come in the future. According to that, we have to change overall the times of each activities which are completed ongoing and the coming activities. Here, this is a question in which we are observing that there are the activities with the days. Here, the particular table is showing the activities and the days and the description which is below which is showing the particularly the what is a condition or you can say what are the present situation or conditions or the datas of the overall activities which are present in the projects. Here, when we observe activity one two and one three are completed as originally planned it is it has been showing and activity three four is in progress and we need six more days for the completion activity four five appear to be present some problem and it is now estimate time of the completion is 10 days and the activity four five can be complete in five days instead of originally planned seven days. Here, see we will construct the particular CPM network diagram for this particular question. This is a network diagram before updating when we go for the construction of the network diagram we have to construct or we have to present the network diagram with the event time as well as the activity times. Here, the yellow box are above and below the circle nodes are showing the event times and the box of which are above the arrow and below the arrows are showing the activity times and the duration of the particular activities. Now, let's see what will be the project duration when we go for the construction of network diagram. Here, we observe that there is a 41 days required to complete the overall project and the critical path one is one three two five and six. Here, these are the particular activities which are critical one one three three two two five and five six in the network which is not till updated as when we see the question they are saying that the project is updating going to or you can say going to update on the 14th day. We have to start as per the defined by the rule that the starting will be in the event one starting time will be the 14 that is the earliest occurrence time of event one and we have to change the durations of the particular activity which are completed or which are on the or in the progress or which are going to come but there will be a change in the duration as due to addition in the new technology or change in the activity execution methodology. Overall, we have to collect the information and we have to assign the newly obtained durations to each activities. Now, as it is been said that from activity one two and one three are complete as originally planned means these two activities are going to be totally complete at the day of 14th. So, this activity duration we have to assign zero here initially when we see the network diagram before updating we are assigning six and particularly one two and one three ten. Now, when we are updating we have to say zero and zero because they are completed. Similarly, we have to see the next activities which are in the progress or which are still need to be execute what will be the duration as per the data we have which are collected from the data source here when we see that they are saying that activity three four is in the progress and we need 16 more days to for the completion activity three four initially when before updating three four the time required was 12. Now, when we have saying when we updated we have to assign instead of 12 16 because this is the data which is particularly collected for the present project which is in the progress and the activity four five appears to be present some problem means as there is some problem it's now estimated time of the completion is 10. When we observe this table we can see that active four five the time required was seven days or you can say duration required was seven days. But when we are updating now we have to change the duration here we have to say that activity particularly four five instead of seven days we are assigning as a 10. Similarly, we have to go for the left activity that is activity four six can be completed in five days instead of originally planned seven days means what activity four six this is activity four six which was initially before every was seven days or required required. Now, due to some advance you can say or some additional technologies or new technology has been adopted or some machines are added for the execution or the resources are added for the execution its reverberation is reduced and it we have to assign the present duration as a five. Now, we have to keep the activities duration as it is which have been not described in the description. Now, this is a overall network diagram after updating. Now, again we have to follow the forward path to get the particular earliest starting and earliest finishing time of each activities and as well as of events and we have to follow the backward path here which will give you the latest start time and latest occurrence time of the particular activities and the of an event as well as when we see that after updating the project duration is four six which was initially before updating the project duration was 41. Now, let's see the comparison. Now, when we start to compare in the network diagram before updating and the network diagram after updating here the critical path was one three two five and six. Now, after updating it is been one three four five and six this is the major difference of the first major difference of the particular network diagram before updating and the after updating here again the project duration is 41 and here the project duration is 46. Second here the initial event that is one it's starting time it was zero but here the initial time in after updating it is 14 which is a third major difference we have to assign for the particular network diagram. This is the particular network diagram presentation before and after updating these are the select the answers for the today's questions. Hope so you have selected the answers correctly. These are the references for today's sessions. Thank you. Thank you very much.