UCLV, Santa Clara, March 2003

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Modern Aspects in Software Engineering5.
Software MeasurementProf. Dr.-Ing. habil.
Reiner DumkeOtto-von-Guericke-Universität
MagdeburgFakultät für Informatik, Institut für
Verteilte SystemeAG Softwaretechnikhttp//ivs.cs
.uni-magdeburg.de/sw-eng/agruppe/
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Software Measurement - Introduction
Measurement
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Software Measurement - Introduction
Software Measurement is the process by which
numbers or symbols are assigned to attributes of
entities in the real world in such a way as to
describe them according to clearly defined
rules. (Fenton, 1991)
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Software Measurement - Introduction
Software Metrics are used to characterize
the essential features of software
quantitatively, so that classification,
comparison, and mathematical analysis can be
applied. (Conte, 1992)
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Software Measurement - Introduction

• Questions
• the size of a program
• the usability of a software system
• the performance of a reactive system
• the estimation of the development costs
• the evaluation of the programmer experience
• the realibility of an embedded system
• the productivity of a software developer

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Software Measurement - Introduction
Software metrics example trend analysis Cost
trends
development effort
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Software Measurement - Introduction

• Software metrics example rules of thumb
• One dollar software development leads to two
  dollar
• maintenance
• 1 KLOC professional software includes 3 errors
• productivity of a programmer 250 LOC/month
• Y2K migration 1500 LOC/month

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Software Measurement - Introduction

• Software metrics example formulas
• Doc pages 0.0347 LOC0.93
• program complexity decisions 1
• current effort total_effort/(total_time2
  edt/2)
• readability 206.85 0.846 word_length
• 1.105
  sentences_length

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Software Measurement - Introduction

• Software metrics example metrics
• code metrics (Halstead, LOC)
• flow graph metrics (McCabe, depth of nesting)
• call graph metrics (Henry-Kafura, coupling)
• structure metrics (levels, entropy)
• etc.

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Software Measurement - Introduction
Halstead Metric
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Software Measurement - Introduction
Halstead Metric
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Software Measurement - Introduction
Halstead Metric
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Software Measurement - Introduction
Flow graph metrics - Dijkstra structures
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Software Measurement - Introduction
Object-oriented Metrics by Chidamber/Kemerer
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Software Measurement - Introduction
Current Situation in Software Measurement
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Software Measurement - Introduction
Current Situation in Software Measurement
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Software Measurement - Introduction
Current Situation in Software Measurement
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Software Measurement - Introduction
Current Situation in Software Measurement
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Software Measurement - Introduction
Current Situation in Software Measurement
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Software Measurement - Introduction
Current Situation in Software Measurement
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Software Measurement - Introduction
Investigations in Software Measurement
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Software Measurement - Introduction
Investigations in Software Measurement
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Software Measurement - Introduction
Investigations in Software Measurement
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Software Measurement - Measures
Horst Zuse (1990) Software measures based on
the measurement theory are founded in a scale
which defines an homomorphism between a numerical
relative and an empirical relative in order to
measure based on units.
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Software Measurement - Measures
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Software Measurement - Measures
Software metrics Software measures
Software measurement Measurement based
controlling
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Software Measurement - Measures
Goal Question Metric (GQM)
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Software Measurement - Measures
Goal Question Metric (GQM)
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Software Measurement - Measures
Goal Question Metric (GQM)
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Software Measurement - Measures
ISO 15939 Software Measurement Standard
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Software Measurement - Measures
Measurement Framework CAME
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Software Measurement - Measures
Measurement Framework Choice
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Software Measurement - Measures
Logiscope Tool
. . .
Analyzability committed(aif) -gt 1 . .
. committed(RECU) -gt 1 1 2 3 4
5 6 Empirical method ?!
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Software Measurement - Measures
FLIGHT QUALITY
Average speed
Intervall scale
average age of the crew
Nominal scale
index of satisfaction
(potentiell) Ratio scale
average temperatur (? C)
Ratio scale
typ of the airplane
- air holes
Ordinale scale
- passengers/capacity
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Software Measurement Measures
LOC(P1 P2) LOC(P1) LOC(P2), LOC((P1 P2)
P3) LOC(P1 (P2 P3)) LOC(P1) LOC(P2)
LOC(P3), LOC(P1 P2) LOC(P2 P1), for LOC(P1)
? LOC(P2) concludes LOC(P1 P3) ? LOC(P2 P3),
exists a number n so that LOC(P1) ? LOC(P2)
and LOC(P3) gt LOC(P4) leads to LOC(P1 nP3) ?
LOC(P2 nP4).
M(P1 P2) M(P1) M(P2), M((P1 P2) P3)
M(P1 (P2 P3)) M(P1) M(P2) M(P3), M(P1
P2) M(P2 P1), for M(P1) ? M(P2) concludes
M(P1 P3) ? M(P2 P3), exists a number n so
that M(P1) ? M(P2) and M(P3) gt M(P4) leads to
M(P1 nP3) ? M(P2 nP4).
LOC(P) Maintenance Unit
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Software Measurement Measures
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Software Measurement CAME tools
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Software Measurement CAME tools
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Software Measurement CAME tools
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Software Measurement CAME tools
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Software Measurement CAME tools
Palm based measurement
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Software Measurement CAME tools
The LOC Agent (as Aglet)
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Software Measurement CAME tools
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Software Measurement CAME tools
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Software Measurement CAME tools
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Questions, Remarks !!!