use case complexity

8/16/2019 Use Case Complexity

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Use case complexity

Use Case Points (UCP):

UCP = (UUCW + UAW) x TCF x ECF

The method for determining the size estimate to develop a sstem is

!ased on a "al"#lation $ith the follo$ing elements%


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• Unadsted Use Case Weight (UUCW) ' the point size of the

soft$are that a""o#nts for the n#m!er and "omplexit of #se

"ases

•

Unadsted A"tor Weight (UAW) ' the point size of the soft$arethat a""o#nts for the n#m!er and "omplexit of a"tors

• Te"hni"al Complexit Fa"tor (TCF) ' fa"tor that is #sed to adst

the size !ased on te"hni"al "onsiderations

• Environmental Complexit Fa"tor (ECF) ' fa"tor that is #sed to

adst the size !ased on environmental "onsiderations

n"e the previo#s fo#r elements have !een "al"#lated* the nal size

estimate "an !e "al"#lated This nal n#m!er is ,no$n as the Use

Case Points or UCP for a soft$are development pro&e"t

Unadjusted Use Case Weight (UUCW):

Use Case Classifcation No. o Tansactions Weight

-imple . transa"tions .

Average / to 0 transa"tions 0

Complex 1 or more transa"tions 2

To "al"#late the UUCW* the #se "ases m#st !e dened and the

n#m!er of transa"tions for ea"h #se "ase identied There are 3 #se

"ases exist for the sstem . of these #se "ase is simple* / are

average and 0 are "omplex* the "al"#lation for UUCW is as follo$s%

UUCW = (Total No. of Simple Use Cases x 1) + (Total No. Average Use Cases x

3) + (Total No. Complex Use Cases x 5)

UUCW = (1 x 1) + (2 x 3) + (3 x 5) = 22

Unadjusted !cto Weight (U!W):


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$alue

T. :istri!#ted sstem /6 0 3

T/

;esponse

time7performan"e

o!&e"tives

.6 / /

T0 End4#ser ePorta!ilit to other

platforms/6 / 1

T? -stem maintenan"e .6 / /

T.6Con"#rrent7parallel

pro"essing.6 . .

T.. -e"#rit feat#res .6 2 2

T./ A""ess for third parties .6 . .


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T.0 End #ser training .6 . .

Total (T"): %%

TC# = !.$ + (T#%1!!)

TC# = !.$ + (33%1!!) = !.33

&n'ionmental Complexity "acto (&C"):

To "al"#late the ECF* ea"h of the environmental fa"tors is assigned aval#e !ased on the team experien"e level The val#es are m#ltiplied

! the $eighted val#es and the total EF is determined

"act

o#esciption

Weig

ht

!ssigned

$alue

Weight x

!ssigned

$alue

E.

Familiarit $ith

development pro"ess

#sed

.2 / 0

E/ Appli"ation experien"e 62 0 .2

E0!&e"t4oriented

experien"e of team.6 / /

E1 @ead analst "apa!ilit 62 2 /2

E2 otivation of the team .6 / /

E3 -ta!ilit of /6 . /


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reB#irements

E Part4time sta 4.6 6 6

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use case complexity

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