1 |
%Assignment is conducted in pairs. Max. 8 pages. |
2 |
\documentclass[12pt, a4paper]{article} |
3 |
\usepackage[latin1]{inputenc} |
4 |
|
5 |
\begin{document} |
6 |
\pagenumbering{roman} |
7 |
\thispagestyle{empty} |
8 |
\begin{centering} |
9 |
Assignment 1 - PAC003: Software Metrics, 5p\\ |
10 |
Jonas Petersson \& Mathias Börjeson\\ |
11 |
\emph{jopd01@student.bth.se \& tb00mbo@student.bth.se}\\ |
12 |
\end{centering} |
13 |
\tableofcontents |
14 |
\newpage |
15 |
\pagenumbering{arabic} |
16 |
\section{Internal product attributes} |
17 |
\subsection{Explain how the three aspects of the software size (Length, |
18 |
Functionality and Complexity) are supplementing each other to describe |
19 |
the notion of software size.} |
20 |
%length = is a physical size of the product |
21 |
%functionality = counts the functions supplied by the product |
22 |
%complexity = measures the complexity od underlying problem, or a solution |
23 |
%utan att ha en aning om hur notationen ser ut drar jag till med följande |
24 |
These three supplements each other adding references to |
25 |
each other. None of these is useful by itself, but by |
26 |
adding them up one can get a better perspective of the |
27 |
size of the software. The length itself don't tell |
28 |
anything of how large the completed software will be, but |
29 |
together with functions and complexity one can understand |
30 |
the size of the software. Once the size of the software is |
31 |
established one may come with effort estimations, and |
32 |
based on those make a budget for what resources the |
33 |
project will need. Given these three it is possible to get |
34 |
an idea of how productive a programmer is during a time |
35 |
unit. It will not be a perfect answer, but it will be |
36 |
something that could be used to measure deviations in work |
37 |
etc. |
38 |
\subsection{Give an example where code length measure can be useful and an |
39 |
example where source code length measure is not useful.} |
40 |
Code length is useful if it is not going to be used by |
41 |
itself. One example of this could be if we are interested |
42 |
in how much work is done in a week. Then we could look at |
43 |
loc, and also take into account the complexity and the functions provided |
44 |
(like loc * complexity / functions or something similar). |
45 |
Then loc could be useful. |
46 |
|
47 |
Code length is useless if it is used by itself. For |
48 |
example the statement I am a good programmer since I |
49 |
produce more then n loc per week useless. |
50 |
\subsection{Explain what are the main ideas behind Albrecht's Function Points. |
51 |
Discuss advantages and disadvantages of the measure. Motivate.} |
52 |
The main idea behind FP's are to provide language |
53 |
independent metric that can be used no matter what |
54 |
language are used. Albrech thought it was wrong that the |
55 |
only way to tell effort and cost per effort until he begun |
56 |
was in loc. A often used metric to tell productivity was |
57 |
cost/loc, and that don't tell anything since different |
58 |
languages require different number of loc's to solve the |
59 |
same problem. This cost could be lover if the language |
60 |
requires a lot of code, but the end cost could still get |
61 |
higher if the program takes longer time to complete. |
62 |
The main idea behind FP's is to give ways to |
63 |
tell cost and productivity in a way that is language |
64 |
independent. FP's does satisfy this idea. A easier |
65 |
language will get a lower cost/FP and a greater number of |
66 |
FP's/person\&month then a more complex language. |
67 |
|
68 |
The great advantage with this method is that it is (almost) truly |
69 |
language independent, while a disadvantage would be that |
70 |
if this is established in the beginning of a project and |
71 |
should be used to choose a appropriate language to use, if |
72 |
the language is unfamiliar, then these metrics can't be |
73 |
computed (like FP's/person\&month). Also this way of presenting |
74 |
the result does not take into account training and |
75 |
inexperience while showing the result. Also this should |
76 |
not be used to compare different projects or groups to se |
77 |
the difference between them since this does not take |
78 |
everything into account. Also one might be tempted to |
79 |
always use the language with the highest productivity, |
80 |
this is good in most cases, but sometimes there are other |
81 |
factors to sum in, like speed, security etc. |
82 |
\subsection{Describe structural measures presented by Fenton. (Control flow |
83 |
structure, Data flow structure, Data structure). Give an example |
84 |
where you explain how one could use the structural measures |
85 |
(specify which structural measure) to ensure the quality of the |
86 |
software product.} |
87 |
svar |
88 |
\subsection{Draw the flow graph for the program, which |
89 |
based on the data provided by everyday measurements of the air |
90 |
temperature will calculate the maximum, minimum and the most |
91 |
commonly occurred temperature (the temperature that occurs twice |
92 |
or more) for a given month. Present program paths that has to be |
93 |
executed in order to satisfy the following testing strategies:} |
94 |
\subsubsection{Statement coverage} |
95 |
svar |
96 |
\subsubsection{Branch coverage} |
97 |
svar |
98 |
\subsubsection{Visit each loop} |
99 |
svar |
100 |
\subsection{Calculate the cyclomatic complexity of your program. What does |
101 |
this figure tell you?} |
102 |
svar |
103 |
\section{OO metrics} |
104 |
\textbf{Measuring the use cases} |
105 |
\subsection{Measure the use case specifications shown in Design 1 using the |
106 |
chosen use case metrics suite from the lecture} |
107 |
svar |
108 |
\subsection{Measure the use case specifications shown in Design 2 using the |
109 |
chosen use case metrics suite from the lecture} |
110 |
svar |
111 |
\subsection{Write a short section (up to ½ page) with answers to the following |
112 |
questions:} |
113 |
\subsubsection{Which of the two systems presented can be expected to be |
114 |
more complex and why?} |
115 |
svar |
116 |
\subsubsection{Which of the two systems can be expected to require more |
117 |
effort to be built? Why?} |
118 |
svar |
119 |
\textbf{Measuring designs} |
120 |
\subsection{Measure the class diagram presented in Design 1 using the CK metrics suite presented on the |
121 |
lecture.} |
122 |
svar |
123 |
\subsection{Measure the class diagram presented in Design 2 using |
124 |
the CK metrics suite presented on the lecture.} |
125 |
svar |
126 |
\subsection{Measure the code in the files .java from Design 1 with the CK metrics suite |
127 |
presented on the lecture.} |
128 |
svar |
129 |
\subsection{ Measure the code in the files .java |
130 |
from Design 2 with the CK metrics suite presented on the lecture.} |
131 |
svar |
132 |
\subsection{Write a short section (up to ½ page) with answers to the following |
133 |
questions:} |
134 |
\subsubsection{Which of the metrics could not be computed based on the class |
135 |
diagrams? Why?} |
136 |
svar |
137 |
\subsubsection{Which of the two systems is more complex? Why?} |
138 |
svar |
139 |
\subsubsection{Which method of gathering metrics - from UML designs or source |
140 |
code - is less time consuming?} |
141 |
svar |
142 |
\section{External product attributes} |
143 |
\subsection{Describe how the external product attributes differ from the |
144 |
internal ones. Describe the connection between external and |
145 |
internal product attributes.} |
146 |
svar |
147 |
\subsection{Assume that you are |
148 |
working at the company that mainly specializes on developing of |
149 |
web-based applications. Your manager gives you an assignment to |
150 |
develop a software quality model for the company. The model should |
151 |
show external quality attributes, corresponding internal |
152 |
attributes and metrics. Present the assumptions that you will use |
153 |
while creating of the quality model. Provide an explanatory text |
154 |
for your model.} |
155 |
max 8 sidor |
156 |
\end{document} |