Agile Web & Mobile App Development

If the final scope of the project cannot yet be estimated and many requirements are not yet precisely described, this variant offers a way to start implementation anyway without incurring large liabilities. The requirements planned for a sprint are always estimated and agreed as a fixed price. An exit is possible after each Sprint. New features can be added before each Sprint. Features that are no longer needed can be omitted if they have not yet been implemented.

For the client, this model offers a good opportunity to become familiar with the agile approach and to assess the performance of the team. Since finished software is delivered after each sprint, dropping out does not mean being left without a result.

Agility does not necessarily mean that you cannot provide a realistic effort estimate in advance. However, the requirements must already be described more concretely and bindingly at the beginning of the project than in a purely agile approach.

New requirements can be added during the course of the project. In return, requirements of the same scope that have not yet been implemented can be omitted, so that the project budget remains untouched. If this is not possible, new requirements can be handled classically as change requests.

This model is suitable for small projects or if the requirements are already described in great detail and few changes are to be expected.

This model is suitable for projects in which, for example, there is a high degree of uncertainty regarding the expected expenditure and technical difficulties due to the technologies used. The actual effort is reimbursed. However, the daily rate is so low that it is just enough to cover the costs. A success fee is paid for the features that the team delivers on time and error-free according to its commitment.

This approach provides an incentive for the product owner and the team to concentrate on delivering achievable features. However, excessive risk avoidance is countered by ensuring that the contractor does not incur losses due to the occurrence of technical risks.

Maximum flexibility is offered by billing according to the actual effort incurred. The product owner controls the course of the project based on his prioritization and bears the financial risk. Features can be added, omitted or changed as desired.

• This model is ideal if the product owner and the team are well coordinated and the team has a good understanding of the user perspective.