btec national - principles of software development 1 principles of software design and development...

Btec National - Principles of Software DBtec National - Principles of Software Developmentevelopment

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Principles of Software Design Principles of Software Design and Developmentand Development

More On Choosing a More On Choosing a LanguageLanguage


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AimsAims

Further discussion into choosing a language


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Choosing a languageChoosing a language

There are a number of factors that must There are a number of factors that must be considered when choosing a language.be considered when choosing a language.

– Organisational policyOrganisational policy– Suitability in terms of featuresSuitability in terms of features– Availability of skilled staffAvailability of skilled staff– ReliabilityReliability– Development and maintenance costsDevelopment and maintenance costs– ExpandabilityExpandability


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Organisational policyOrganisational policy

Some companies have an organisational Some companies have an organisational policy as to what computers and software policy as to what computers and software can be used.can be used.

– For example they may only use Microsoft For example they may only use Microsoft products therefore restricted to MS products therefore restricted to MS programming environmentsprogramming environments


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Suitability in terms of featuresSuitability in terms of features

The questions of suitability that need to be The questions of suitability that need to be asked are:asked are:

– What platform does the program need to work What platform does the program need to work on i.e. hardware / operating systemon i.e. hardware / operating system

– Does the programming environment have the Does the programming environment have the necessary features to carryout the tasks?necessary features to carryout the tasks?


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Availability of skilled staffAvailability of skilled staff

– The developers that are employed within the The developers that are employed within the company may be only skilled within a company may be only skilled within a particular language therefore this language particular language therefore this language maybe the natural choice.maybe the natural choice.


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ReliabilityReliability

– Some programming languages have features Some programming languages have features that are built in to it to make programs more that are built in to it to make programs more reliable i.e. debug etcreliable i.e. debug etc


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Development and maintenance Development and maintenance costscosts

– The cost of developing and maintaining The cost of developing and maintaining programs is an important consideration when programs is an important consideration when embarking on a software development project.embarking on a software development project.


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ExpandabilityExpandability

– Some languages expand or scale better than Some languages expand or scale better than others and have features which support large others and have features which support large systems, for example, OOP – (Manages systems, for example, OOP – (Manages complexities by using objects) or PHP complexities by using objects) or PHP (Hypertext Pre-processor) to enable (Hypertext Pre-processor) to enable developers to create dynamic content that developers to create dynamic content that interacts with databases to support a very interacts with databases to support a very large number of users.large number of users.


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ConclusionConclusion

Discussed further into choosing a language

btec national - principles of software development 1 principles of software design and development...

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