Question (Table, Netweork digram, Es,etc)

Submitted by Lena on Thu, 12/06/2012 - 08:03

Hello everybody,

Would you please help with the following question:

 

The application for an IT applications is estimated to take 2 weeks to complete. When this activity has been completed, work can start on three software module , A, B, C. Design\ Coding of these modules will be 5, 10, and 10 days, respectively. Module A and B can be unit-tested together as their functionality is closely associated. This joint testing should take about 2 weeks. Module C will need 8 days of unit testing. When all unit testing has been completed , integrated system testing will be needed, talking a further 3 weeks. This testing will be based on the functionality described in the specification and will need 10 days of planning.

1. Create a table showing , for each activity, activity name, duration, and predecessors.

2. Creat a network diagram for the project.

3. For each activity, calculate: ES, EF,LS,LT, and Float.

4. List all paths through the network and identify the critical path.

5. If only one person available to work on the project , what effect would this have on the project duration

 

Many thanks,

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sspawar

Thu, 12/06/2012 - 15:40

Weeks are considered as durations of work days of all 7days,bks these are not schedule

 

        

 

 

      
    SN Activity duration
in days		 prece      
    1 S 14      
    2 AB 14 S      
    3 C 8 S      
    4 P 10      
    5 ABC 21 AB,C,P      
                 
      14 28        
      > AB/14        
0 14   28 49
  S/14 14 28   ABC/21
        >
    14 22    
0 14   > C/8 28 49
             
      20 28      
    0 10        
      P/10    
               
    18 28          
  If one person carry out all activities, then it takes = 14+14+8+10+21 = 67days
                 

 

Lena

Thu, 12/06/2012 - 20:35

Thank you so much!
 

 I have 2 more questions:

1. Why you don't calculate the design\ coding for the three module (5, 10, 10) days!

2. would you please clarify why there is no predecessor for (P) task. For example, (AB, C) or (S).



cheers ^_^

sspawar

Fri, 12/07/2012 - 08:55

its only coding /description numbers.

if it is activities with number of days , then every thing will be different.

let see

      SN Activ
ity		 duration
in days		 prece      
      1 S 14        
      2 A 5 S      
      3 B 10 S      
      4 C 10 S      
      5 AB 14 A, & B      
      6 C1 8 C      
      7 P 10        
      8 ABC 21 AB,C,P  

 critical path >

               
                             
    14 19   24 38      
      A/5   > AB/14      
                   
    19 24   24 38      
0 14 14 24         38 59
> S/14 > B/10         > ABC/21 
                   
0 14 14 24         38 59
          24 32      
    14 24     C1/8      
      C/10            
          30 38      
    20 30 0 10        
          P/10        
                   
        28 38        
  If one person carrys out all activities, then it takes   
  = 14+5+10+10+14+8+10+21 =92days      

Lena

Fri, 12/07/2012 - 09:24

Thank you so much for your quick reply!