Iso12207

Primary lifecycle processes

The primary lifecycle processes contain the core processes involved in creating a software product. These processes are divided into five different main processes:
Acquisition
Supply
Development
Operation
Maintenance
Because the primary lifecycle processes cover a very large area a scope was defined. This entry explains all the primary lifecycle processes butwill explain the Acquisition and Development processes more extensively.
[edit]Activities

Each phase within the primary lifecycle processes can be divided into different activities. This chapter explains the different activities for each primary lifecycle process..
[edit]Acquisition
Acquisition covers the activities involved in initiating a project. The acquisition phase can be divided intodifferent activities and deliverables that are completed chronologically.
Initiation: during this activity the following tasks are completed
The need is described why to acquire, develop, or enhance a product;
System requirements are defined and approved if applicable;
The global software requirements are defined;
Evaluation of other options, like a purchase of an off-the-shelf product orenhancement of an existing product;
If an off-the-shelf product is purchased, the software requirements of this product need to be analyzed.
An acquisition plan is developed, this plan will be used further on during the acquisition phase
Acceptance criteria are defined.
Request for proposal preparation: during this activity the following tasks are completed
Acquisition requirements, like Systemrequirements and technical constraints such as target environment, are defined.
Required ISO/IEC 12207 process for the project are defined and changed accordingly if needed.
Contract milestones for reviewing and supplier's progress audits are defined.
Prepare Contract: during this activity the following tasks are completed
Selection procedure for suppliers are developed;
Suppliers, based onthe developed selection procedure, are selected;
The tailor-made ISO/IEC 12207 standard must be included in the contract;
Negotiate changes: during this activity the following tasks are completed
Negotiations are held with the selected suppliers;
Update contract: during this activity the following tasks are completed
Contract is updated with the result from the negotiations in the previousactivity.
Supplier monitoring: during this activity the following tasks are completed
Activities of the suppliers according to the agreements made are monitored;
Work together with suppliers to guarantee timely delivery if needed.
Acceptance and completion: during this activity the following tasks are completed
Acceptance tests and procedures are developed;
Acceptance and testing on the productis conducted;
Configuration management on the delivered product is conducted;
[edit]Supply
During the supply phase a project management plan is developed. This plan contains information about the project such as different milestones that need to be reached. This project management plan is needed during the next phase which is the development phase.
[edit]Development
During the developmentphase the software product is designed, created and tested and will result in a software product ready to be released to the customer. Throughout time many people have developed means of developing a software application. The choice of developing method often depends on the present situation. The development method which is used in many projects is the V-model. Techniques that can be used during thedevelopment are UML for designing and TMap for testing. This entry contains the most important steps of the V-model.
Define functional requirements: during this activity the following tasks are completed
Gather the functional requirements, or demands, for the product that is to be created.
Create High level design: during this activity the following tasks are completed
A basic layout of the...