Programmer's ROM - The Computer Language Library

home *** CD-ROM | disk | FTP | other *** search

/ Programmer's ROM - The Computer Language Library / programmersrom.iso / ada / manage / manpower.doc < prev next >

Wrap

Text File | 1988-05-03 | 18.5 KB | 343 lines

XDJDE FORMAT=P06PDE,MARGIN=(0.5 IN),END; USERS MANUAL version 1.0 for MANPOWER by Bonnie Burkhardt May 9, 1985 Western Division GTE Government Systems Group 100 Ferguson Drive Mountain View, CA 94039 Page 2 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . 2 2.0 USAGE INSTRUCTIONS: . . . . . . . . . . . . . . . . 2 2.1 Change The Parameters . . . . . . . . . . . . . . 2 2.2 Size Of The Project . . . . . . . . . . . . . . . 3 2.3 Schedule Equations . . . . . . . . . . . . . . . . 3 2.4 Write Another Report . . . . . . . . . . . . . . . 4 3.0 SAMPLE OUTPUT . . . . . . . . . . . . . . . . . . . 6 Page 3 1 INTRODUCTION The Manpower program calculates the amount of effort and the corresponding time schedule for a project of a specified size. It plots a series of graphs showing the tradeoffs between effort and time. 2 USAGE INSTRUCTIONS: 2.1 Change The Parameters After invoking MANPOWER, the user is asked if the parameters should be changed. The following prompt is written to the screen: Would you like to change any of the parameters in the COCOMO equations? (Y or N -- def=N) : If the response is 'Y' or 'y', the program prompts the user for new parameter values as described below. If any other response is entered or a <ret> is pressed, the program proceeds on to the next section, "Size of Project". After determining that the parameters should be changed, each COCOMO equation (Organic, Semidetached, and Embedded) is displayed on the screen with the default values of the parameters. The user is then prompted to fill in the desired parameter values. The parameters can assume a new value by entering a real number and pressing <ret>, or they can assume the default value by pressing <ret> only. The prompt for the Organic equation is as follows: Enter the value of the parameter (X.X) (Press <ret> to assume the default value) Organic MM = 2.400 * KSLOC ** 1.050 TDEV = 2.500 * MM ** 0.380 Enter coefficient of the ManMonth equation (default = 2.400) : Enter exponent of the ManMonth equation (default = 1.050) : Enter coefficient of the Development Schedule equation (default = 2.500) : Enter coefficient of the Development Schedule equation (default = 0.380) : Page 4 The Semidetached and Embedded equations are listed below. The parameters can be changed by responding to a set of prompts similar to the Organic equation. Semidetached MM = 3.000 * KSLOC ** 1.120 TDEV = 2.500 * MM ** 0.350 Embedded MM = 3.600 * KSLOC ** 1.200 TDEV = 2.500 * MM ** 0.320 2.2 Size Of The Project The user will then be prompted for the size of the project. The following is written to the screen: Enter # of lines of source code in thousands (XX.X) : The user then enters the number of lines of code as a real number, e.g., 0.2 or 2.0. 2.3 Schedule Equations The user is then prompted to select the mode which best suits the project in question. The following prompt is written to the screen: Basic Cocomo Effort and Schedule Equations: 1. Organic 2. Semidetached 3. Embedded Enter number corresponding to MODE type desired: The modes, according to Barry W. Boehm, are described as follows: 1. Organic mode -- Relatively small software teams develop software in a highly familiar, in-house environment. Most people connected with the project have extensive experience in working with related systems within the organization, and have a thorough understanding of how the system under development will contribute to the organization's objectives. 2. Semidetached mode -- This mode represents an intermediate stage between the organic and embedded modes. This means either an intermediate level of the project characteristic or a mixture of the organic and embedded mode characteristics. Any of the following would be characteristic of a semidetached mode project: 1. The team members all have an intermediate level of experience with related systems. 2. Page 5 The team has a wide mixture of experienced and inexperienced people. 3. The team members have experience related to some aspects of the system under development, but not others. 3. Embedded mode -- The major distinguishing factor of an embedded-mode software project is a need to operate within tight constraints. The product must operate within (is embedded in) a strongly coupled complex of hardware, software, regulations, and operational procedures. 2.4 Write Another Report The last prompt written to the screen is: Do you want to write another report (Y or N -- def=N): If the user replies 'Y', the program goes back to the point where the users is prompted for the size of the project, and repeats. Any additional reports are appended to the previous one. If the user replies 'N' or just presses <ret>, the program terminates and the report generated is located in the file called 'MANPOWER.RPT'. XDJDE FORMAT=LNDPDE,MARGIN=(0 IN),END; Page 6 3 SAMPLE OUTPUT Boehm / DeMarco / GTE Estimated Staffing Profiles lines of source code in thousands (KSLOC) = 50.0000 Man-months of effort (equation from Barry W. Boehm, pg.75, table 6-1) = 239.8654 Most likely delivery time (equation from Barry W. Boehm, pg.75, table 601) = 17.0188 The impossible region (equation from Tom DeMarco, pg.181) = 11.805 months or less Equation mode type used: SEMIDETACHED Page 7 Nominal Schedule -------------------- ********** Acceleration rate = 0.014 ***** Peak staffing occurs around month 6.0 ********** Staffing Estimate: Month Est. Staff ----- ---------- 24 | * * * 1 6.62286 23 | 2 12.70092 22 | * 3 17.76339 21 | * 4 21.47354 20 | 5 23.66424 19 | * 6 24.34403 18 | * 7 23.67542 17 | * 8 21.93248 16 | 9 19.44815 15 | 10 16.56202 14 | * 11 13.57762 13 | * 12 10.73419 12 | 13 8.19461 11 | * 14 6.04714 10 | 15 4.31707 9 | 16 2.98356 8 | * 17 1.99719 7 | * 6 | * 5 | 4 | * 3 | * 2 | * 1 | +--------------------------------------------------- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Duration (months) Page 8 EXTENDED SCHEDULE -------------------- ********** Acceleration rate = 0.010 ***** Peak staffing occurs around month 7.1 ********** Staffing Estimate: Month Est. Staff ----- ---------- 21 | * 1 4.74957 20 | * * 2 9.21841 19 | * * 3 13.15323 18 | * 4 16.35199 17 | 5 18.68074 16 | * * 6 20.08181 15 | 7 20.57271 14 | * 8 20.23668 13 | * 9 19.20709 12 | * 10 17.64831 11 | 11 15.73599 10 | 12 13.63939 9 | * * 13 11.50756 8 | * 14 9.46038 7 | 15 7.58449 6 | * 16 5.93368 5 | * * 17 4.53248 4 | 18 3.38186 3 | * 19 2.46575 2 | * * 20 1.75732 1 | +------------------------------------------------------------ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Duration (months) Page 9 COMPRESSED SCHEDULE -------------------- ********** Acceleration rate = 0.020 ***** Peak staffing occurs around month 5.0 ********** Staffing Estimate: Month Est. Staff ----- ---------- 29 | * 1 9.40463 28 | * * 2 17.71390 27 | 3 24.04229 26 | 4 27.86849 25 | * 5 29.09715 24 | * 6 28.02121 23 | 7 25.20676 22 | 8 21.34129 21 | * 9 17.08886 20 | 10 12.98490 19 | 11 9.38486 18 | * 12 6.46310 17 | * 13 4.24674 16 | 14 2.66515 15 | 15 1.59880 14 | 13 | * 12 | 11 | 10 | 9 | * * 8 | 7 | 6 | * 5 | 4 | * 3 | * 2 | * 1 | +--------------------------------------------- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Duration (months)