Arrange the following steps of software lifecycle in correct order. 1. Retire 2. Test 3. Operate 4. Deploy 5. Ideation 6. Develop 7. Design

The standard software development lifecycle (SDLC), which is a foundational concept for ITIL's software development and management practice, follows a logical progression. The process begins with an idea (Ideation), moves to planning (Design), then creation (Develop). Following development, the product is rigorously checked (Test) to ensure it meets requirements before being released to users (Deploy). It is then used and maintained (Operate) until it is no longer needed (Retire).

The correct sequence is: Ideation -> Design -> Develop -> Test -> Deploy -> Operate -> Retire.

None of the provided options (A, B, D) match this correct sequence. Specifically, option A incorrectly places deployment before testing. Therefore, 'None of the above' is the correct answer.

A. This option incorrectly places 'Deploy' before 'Test'. Software must be validated through testing before it is deployed to a live environment for operational use.

B. This option incorrectly begins the lifecycle with 'Retire'. Retirement is the final phase when a service or product is decommissioned.

D. This option presents an illogical sequence. For instance, it places 'Test' before 'Develop' and 'Design' after 'Deploy', which violates the fundamental process flow.

1. AXELOS. (2019). ITIL® Foundation: ITIL 4 Edition. TSO (The Stationery Office).

Section 5.2.4

Design and transition: This section describes the value chain activity that ensures products and services meet expectations. It explicitly lists key activities in the logical order of "...development

testing

and deployment of new and changed components..." This official text confirms that testing precedes deployment

invalidating option A.

2. Purdue University

College of Engineering. (n.d.). Systems Development Life Cycle.

This university courseware outlines the standard phases of the SDLC as: 1. Planning (includes ideation)

2. Systems Analysis and Requirements

3. Systems Design

4. Development

5. Integration and Testing

6. Implementation (Deployment)

7. Operations and Maintenance. This academic source confirms the standard Develop -> Test -> Deploy sequence.