A major information system has 1140 modules.There are 96 modules that perform control and coordinationfunctions and 490 modules who function depends on prior processing.The system processes approximately 220 data objects that each havean average of three attributes. There are 140 unique data baseitems and 90 different database segments. Finally, 600 modules havesingle entry and exit points. Compute the DSQI for this system

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Faiza Fuller · Accepted Answer

Given data, The total number of modules S1=1140 The control and coordination functions S2=96 The number of modules whose function depends on prior processing S3=490 The number of database objects S4=220 The total number of unique database items S5=140 The number of different database segments S6=90 The number of modules with a entry and exit point S7=600 Above all values are determined for a computer program, now, have to calculate intermediate values follows: Program structure D1 was developed using a distinct method, So, here D1=1 Module independence D2=1−(S2S1) =1−(961140) D2=0.91579 Module not dependent on prior processing D3=1−(S3S1) =1−(4901140) D3=0.57018 Database size D4=1−(S5S4) =1−(140220) D4=0.36364 Database compartmentalization D5=1−(S6S4) =1−(90220) D5=0.59091 Module entrance/exit characteristic D6=1−(S7S1) =1−(6001140) D6=0.47368 Now, with the intermediate values determined, the DSQI is computed in the follows: DSQI(Design structual quality index) =SwiDi Where i=1 to 6, wi is the relative weighting of the importance of each of the intermediate values, if all Di are weighted equally, then wi=0.167 DSQI=0.167×(D1+D2+D3+D4+D5+D6) =0.167×(1+0.91579+0.57018+0.36364+0.59091+0.47368) =0.167×(3.9142) ∴DSQI=0.65367

A major information system has 1140 modules.There are 96 modules that perform control and coordinationfunctions and 490 modules who function depends o

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