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- Quality & Testing
Software Requirement Concepts & Process
Instructor: Nguyễn Thị Thanh Trúc
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- Agenda
1. Quality & Testing
2. Requirement Concepts
3. Fsoft Requirement Process
4. Requirement Clarifying
5. Requirement Modeling
6. Modeling Tools
7. Common practices, problems
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- Evolution of quality –Means & Focus
1980 1985 1990 1995
197
2000
5
Productivity Quality TQC/TQM
Total
Quality Quality
Circle
Quality
Employee
of
Involvement
Work life
Self Self
Directed Directed/Manage
Employees Teams d
Empowerme
nt Teams
Operation
1/1/2013
Customers
Confidential
Innovations 3
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- Project Scope
BA QA (realizing)
4
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- Bug & Defect
Error
Bug Defect
Development Test Shipped to
the customer
5
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- Testing & Requirement
6
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- Risk Based
Test critical quality
risks
Optimum Test Cost of
Testing
“Understanding
risk is the key to
Optimum testing”
7
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- Bug Distributing
12
10
8
6
4
2
0
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Test Time
8
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- Importance of Testing Early in the SDLC
• Error removal cost over SDLC
120
100
80
Cost
60
40
20
0
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Po
-le
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In
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Lo
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9
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- Quality Assurance & Control
Quality Control
Quality
(QC) is a set of
Assurance (QA) is
procedures
a set of processes
designed to ensure
designed to ensure
a product adheres
the developed
to a set of quality
product satisfies
criteria and meets
customer
the client or
requirements in a
customer
reliable fashion
requirements
10
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- Quality Assurance & Control (cont)
11
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- Testing roles
Manager PM
Scope Cost
Project Time Quality
Customer
Employee
Organization
12
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- Common Definition
• Baseline
• Methodology
• Process
• Procedure
• Software Build
• Releases and Cycles
• User Case
• Test Case
• Test Script and Test Suite
• Benchmark
13
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- Requirement Concepts
Requirement Definition
• What is requirement?
• A statement of a service the system
must do OR
• A statement of a constraint the system
must satisfy
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- Requirement Concepts
Requirement Definition
• Why do we need requirements?
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- Requirement Concepts
Requirement Definition
• Purpose of requirement:
– Requirements often serve as:
• The basis for a bid for a contract - therefore must be high-
level to open for interpretation
• The basis for the contract itself - therefore must be detailed
– Thus, requirements can be high-level or detailed
• What are not Requirements
– Design or implementation details (other than known
constraints)
– Project planning information
– Testing information
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- Requirement Concepts
Requirements Classification 1/4
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- Requirement Concepts
Requirements Classification 2/4
• Requirement may be classified as
– Functional
• A service the system has to perform
• May include information the system must contain
– Non-functional
• A constraints the system must satisfy
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- Requirement Concepts
Requirements Classification 3/4
• Sample of functional requirement
The “Data Entry Module” should provide the
following functionality:
– Data Entry for HR: allows HR staff to enter payroll data, either
via web-based forms or by importing data from Excel files
– Data Entry for Regional offices: allows the PGB’s regional
offices to enter billing data, either via web-based forms or by
importing data from Excel files
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- Requirement Concepts
Requirements Classification 4/4
• Sample of non-functional requirement
• Product requirements
– Requirements which specify that the delivered product
must behave in a particular way
– Categories: performance, reliability, usability, security,
cultural, etc.
• Organisational requirements
– Requirements which are a consequence of
organisational policies and procedures
– Categories : technology, process, operation, time, budget,
etc.
• External requirements
– Requirements which arise from factors which are
external to the system and its development process
– Categories : interoperability requirements, legislative
requirements, etc.
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