Software Engineering Profession Flashcards by Deivis D

Software Engineering based on Wang & King

Software engineering is a discipline that adopts engineering approaches, such as established methologies, processes, measurement, tools, standards, in the development of large-scale software seeking to result in high-productivity, low cost, and measurable development schedule.

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Software Engineering by John A McDermid?

Software engineering is the science and art of specifying, designing, implementing and evolving - with economy, timeliness and elegance - programs, documentation and operating procedures whereby computers can be made useful to man.

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Ian Somerville definition of Software Engineering?

Software Engineering is an engineering discipline that is concerned with all aspects of software production from initial conception to operation and maintenance.

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Wang and King?

An engineering discipline.

Large scale software

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Characteristics of Software Engineering?

Inherent complexity and diversity
Difficulty of establishing and stabilizing requirements
Changeability or malleability of software
Abstraction and intangibility of software
Requirement of various problem-domain knowledge

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Engineering Dimensions?

Size
Cost
Quality
Lifetime
Measurability
Repeatability
Reusability

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What is Size dimension?

Size of problem and its solution

More than 5000 LOC
Size of team, more than one person often tens or hundreds of people

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What is Cost dimension?

Cost of the problem

- Minimal cost, high productivity

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What is Quality dimension?

Quality of the solution

- Suitability, Maintainability, Extensibility, Reliability, Dependability, Efficiency

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What is Lifetime dimension?

Lifetime of the system

- A system that endures and exceeds the lifetime of involvement of original developers

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What is Measurability dimension?

Measurability

- Based on the evidence provided by concrete metrics

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What is Repeatability dimension?

Capable of achieving the same result with the same constraints and process

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What is Reusability dimension?

Capable of reusing and building on existing artefacts to solve similar problems

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Software Trade-Off Triangle?

Schedule
Cost
Product

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What do Software Engineers do?

Engineers carry out a task by making series of decisions.
Engineers measure things, they use approximations based on experience and empirical data.
Engineers emphasize the use of a disciplined process when creating a design and can operate effectively as part of team in doing so.
Engineers can have multiple roles: research, development, design, production, testing, construction.

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Why is Software Engineering difficult?

Cognitive Constraints
Organizational Constraints
Resource Constraints

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Cognitive Constraints?

Intangibility
Complexity
Indeterminacy
Diversity
Polymorphism
Inexpressiveness
Inexplicit Embodiment
Unquantifiable Quality

Organizational Constraints?

Time Dependency
Conservative Productivity
Labour-Time Interlock

Resource Constraints?

Cost
Human Dependency
Hardware Dependency

What is good software?

8 -ilities

Functional Suitability
Usability
Maintainability
Reliability
Security
Performance Efficiency
Compatibility
Portability

Functional Suitability?

Completeness, correctness, appropriateness.

Usability?

Appropriateness recognizability, learnability, operability, user error protection, user interface aesthetics, accessibility.

Maintainability?

Modularity, reusability, analysability, modifiability, testability

Reliability?

Maturity, availability, fault-tolerance, recoverability

Security?

Confidentiality, integrity, non-repudiation, accountability

Performance Efficiency?

Time behaviour, resource utilization, capacity

Compatibility?

Co-existence, interoperability

Portability?

Adaptability, installability, replaceability

Software Engineering Activities?

``` Requirements Analysis and Definition Software Design Programming and Dev Testing QC and QA Project Management ```

Requirements activities produce?

The use-case model artifact

Design activities produce?

The design model artifact

Implementation activities produce?

Code, test-cases, documentation

Methodology is?

the recipe, the steps to be followed in order to produce the artifacts of the given activity

Project Management Methodologies?

Iterative, spiral, waterfall, SCRUM

Requirement Methodologies?

Use-cases, functional specification, DFDs

Design Methodologies?

Object-Oriented Analysis and Design, Structured Design, Component-Oriented Design, Service-Oriented Design

Implementation Methodologies?

Object-Oriented Programming, Structured Programming, Functional Programming, Test-Driven Development

Foundations of Software Engineering?

Theoretical and Organizational

Theoretical Foundations?

``` Philosophical Computing Mathematical Linguistic Information ```

Organizational Foundations?

``` Engineering Cognitive Informatics System Science Management Science Economics Sociology ```

Diversity of Software Systems?

``` Stand-Alone Interactive, transaction based Embedded control systems Batch processing systems Entertainment Systems ```

Software Engineering Ethics?

``` Public Client and Employer Product Judgement Management Profession Colleagues Self ```