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Acceptance Testing

The Beta testing stage of the SDP

Adaptive Maintenance

Changing the software in response to changes in the client's hardware


First stage of the SDP concerned with gathering knowledge and understanding the problem

Bottom-up Design

A design methodology which begins with writing procedures and blocks of code


Translates a high level language program into object code

Comprehensive Testing

Testing programs as thoroughly as possible


Joining strings together

Corrective Maintenance

Fixing bugs or mistakes which were not discovered at the testing stage

Counting Occurrences

Used to count how many times a value appears in a list

Data Flow

The movement of data between subprograms, implemented using parameters

Data Types

Types of data stored by a program including string, integer, real, single


A data structure in which data items of the same type are grouped together


The process of finding and correcting errors in a program


A stage of SDP that involves the planning of a solution to the problem

Design Notation

A way of describing the design of a program eg. pseudocode or structure diagram


A stage of the SDP where a user guide and technical guide are produced


Software is evaluated for excessive resource use such as memory or backing storage

Exceptional Test Data

Test data which should be rejected by the program under test conditions

Exhaustive Testing

Involves all the possible sets of test data and all of the program pathways

Extreme Test Data

Test data which is on the boundary of what is acceptable by the program

Field Testing

Allowing users other than the programmers to test the program

Fixed Loops

A loop which is carried out a set number of times

Flow Chart

A design notation using boxes linked by arrows showing data flow

Input Validation

Used to check that data input is with an acceptable range


Translates and runs a high level language one line at a time


Revisiting or repeating steps in the SDP to improve the solution

Linear Search

Used to find a target value in a full list

Local Variable

Variables defined only for use in one subprogram


An evaluation criterion that determines how easy it is to maintain a program


When a program is divided into smallers sections called subprograms

Module Library

Pre-defined and tested subprograms which speed up the SDP

Normal Test Data

Test data which is within a range that the program should accept

Perfective Maintenance

Adding new features to a program and the request and cost of the client


An evaluation criterion that assesses if the software can be used on a computer other than the one on which it was designed


Writes code working to a software specification

Project Manager

In charge of the whole software development process


A text-based design notation using ordinary language to define a problem


How easy it is for your program to be read by anyone else


How well your program operates without stopping due to design faults


The ability of software to cope with errors during execution without crashing

Software Specificiation

Legally binding document defining the problem

Stepwise Refinement

Breaks each step down as far as possible until each step can be turned into a line of code

Structure Diagram

A design notation using different shaped boxes and showing hierarchy


Secting part of a string

Technical Guide

Documentation designed for technical personnel that explains how to install software

User Guide

Documentation that explains how to operate the software once it has been installed

Systems Analyst

Interviews company personnel and observes current procedures looking for ways to improve the system

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