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Topic 8 - Development Methods

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Introduction

Topic 8 - Development Methods Linear methodology - systems development methodology where the project is divided into sequential phases where one phase is completed before the next one starts. Iterative methodology - attempts to solve a problem by finding successive approximations to the solution starting from an initial guess. Iteration means the act of repeating a process usually with the aim of approaching a desired goal or target or result. Each repetition of the process is also called iteration and the result of the last iteration is used as a starting point for the next iteration. System Investigation/Feasibility Project definition: Is identifying the problem that needs to be solved using ICT and then stating what the problem is in clear terms by writing a project definition. Aims & Objectives of the New System: Is the definition that will be stating aims and objectives of new system. These might include: * Being able to accurately predict delivery dates for customer orders. * Reducing number of input errors. * Reducing the number of part deliveries by having a much more efficient and accurate stock control system. ...read more.

Middle

Operational Testing - Is performed by end user on software which is being used in its normal operating environmental. User Testing - Allows the team of users to test the software or system. Installation and Conversion This is the stage where the completed and fully tested system is installed on operational equipment for real life use. Implementation will involve: * Installing hardware. * Installing software. * Conversion if previous data. * Training of all users. * Production of documentation and training guides to hep people understand the system. Review and Maintenance After installation and conversion stage as it is only then that users will find problems and shortcomings. Review will involve: * Checking that user requirements are still meet. * Assessment of how happy the user is of the new system. * Setting up a system review to make sure that user requirements is been meet. * Setting a help desk facility to help others who have problems. Maintenance will involve: * Altercations in the system , adding extra functions. * Any systems crashes to be investigated to find out the reasons for their occurrence. ...read more.

Conclusion

* In some projects will want to see a rough working of a working version in order to make comments or adjustments. * Offers simple, disciplined approach to developing system. * Each task is completed fully so problems are dealt with at the time, so no need to go back. * Bugs found early in software so costs are low to correct than if it was later into the development. Iterative Methodologies This is when the project is broken into different stages and undergoes a cyclic development process., this is when each stage is evaluated, until it is improved to meet developer and user requirements, this is then taken into account when completing other stages. * Each time a step is completed the project improves as it highlights the value learning. * It allows user involvement resulting in better solution. * User involvement causes problems with their day to day work. * Increased user involvement may increase features which will effect costs and timing. Linear method is appropriate when: * Where the project is large. * Pressure doesn't exist. * Has clear objectives and solutions. * Inexperienced. Iterative method is appropriate: * Project is based online. * Requirements are made unclear. * Experienced team. * Pressure is on the team. ...read more.

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