Mark II function The function types are points

Input data types 6

Entities accessed I

Output data types I

Unadjusted function points = (0.58 x 6) + ( 1.66 x I ) + (0.26 x I ) = 5.4.

5.8 SLOC estimate figure F.5 gives an outline program structure. The numbers in circles are our for customer estimates of the lines of Cobol code needed to implement each subprocess in the insertion program program. They should add up to 95 SLOC. Note that these do not includc data declarations.

Table F.6 shows a comparison of the actual work-months from Table 5.1 and the 5.9 COCOMO COCOMO estimates. It illustrates the need for the calibration of COCOMO to suit estimates local conditions.

Table F.6 Comparison of COCOMO estimates ami actual effort

SLOC

Actual (work-months)

COCOMO estimates

Difference (work months)

Differenced)

6050

16.7

15.9

-0.8

-4.9

8363

22.6

22.3

-0.3

-1.2

13334

32.2

36.4

4.2

13.1

5942

3.9

15.6

11.7

299.7

3315

17.3

8.4

-8.9

-51.2

38988

67.7

112.4

44.7

66.0

38614

10.1

II 1.2

101.1

1001.5

12762

19.3

34.8

15.5

80.2

26500

59.5

74.9

15.4

25.9

5.10 COCOMO -calculating the development multiplier

Tabic F.7 shows development effort multipliers idem) for the IOE project. Table F.7 Calculating the development multiplier

Factor

Rating

Multiplier

ACAP

very high

0.71

AEXP

low-

1.13

PCAP

high

0.80

VEXP

high

0.90

I.EXP

low

1.07

final estimate = 4 person-months x 0.62 = 2.48 staff months

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