Structured Approach - A method of development which follows a series of steps, mainly developed in an order of processes ( set process, to be done in a specific order)

Agile development - Agile development is the same as a waterfall development, but allows for modification of step process (allows for the change of step process, to be done in any order specific to developer)

Prototyping - the process of modeling a part or full solution, using feedback to improve/refine project. 

Rapid Application Development  (RAD) - When developers want to have the immediate software, without having to spend a lot of time/money on it. Less planning while having the program suited towards the developer. May include the agile, waterfall or spiral software development.

End User Approach - Is when the user develops their own software. These projects are usually not large and don't take much time. This approach is usually often done by people who are part of a small business or similar and needs a specific solutions for themselves.

Waterfall Development/Structured Approach

Advantages:

• Reduces complexity (modularity)

• Focuses on ideal (logical) system

• Standardises (team design)

• Provides a future orientation

• Relies less on artistry (engineering approach)

Disadvantages:

• Does not allow for much reflection or revision

• Once reached to testing stage, it is difficult to go back and change something which was not well-documented or thought upon in the concept stage

Agile Development 

Advantages:

• Fast development

• Allows developers to fix problems when encountered

• accommodates change systematically

• encourages collaboration along with communication in real time

Disadvantages:

• Development is rushed if time isn't managed correctly

• Solution could have multiple versions out before it is 100% complete

• Constant communication can be difficult to maintain

• Fixing problems on the spot can be difficult

Prototyping 

Advantages:

• Reduced time and costs - Prototyping improves the quality of specifications and requirements provided to the customers.

• Improved and increased User Development - Prototyping requires user involvement and enables them to see and interact with a working model or project.

Disadvantages:

• Insufficient Analysis - Focusing on a limited prototype will distract developers from properly analysing the complete project

• User Confusion -  Mistaking prototype for completed project

• Developer Misunderstanding of User 

• Excessive Development Time

Rapid Application Development

 Advantages:

• Process can be measured

• Quickly generates productive code

• Quick, consistent user feedback

• Adaptability

Disadvantages:

• Needs modular systems

• Not suitable for large scale projects

• Demands for the user feedback

• Dependent on developer's skill

End User Development:

This is most often done by people who are part of a small business and just need a specific solution for themselves.

Advantages:

• Includes standard software packages which give the end user sufficient knowledge to customise the product to suit their particular needs.

• When the end user has a need or idea for a specific software solution, they develop the software using tool with which they are familiar

• Cheap and Quick (no need for copyright, no need to hire developers)

Disadvantages:

• Lacks formal stages

• Development is unstructured, informal and is often undertaken with little initial planning

• No need to record the solution and therefore little prospect of future development.