The requirements life cycle ends when:

The requirements life cycle is intrinsically linked to the life cycle of the solution it describes. Requirements are not only used for the initial development but are also maintained throughout the solution's operational life to guide maintenance, support, and future enhancements. The life cycle for a requirement formally ends when it is no longer needed. This typically occurs when the solution, or the specific component the requirement represents, is decommissioned or retired. At this point, the requirement itself is also retired, concluding its life cycle.

A. Verification and validation are critical quality assurance activities that occur during the requirements life cycle to ensure correctness, not at its conclusion.
C. A solution being defined and approved is a significant milestone that typically precedes implementation, but the requirements remain active to guide subsequent phases.
D. The project team disbanding marks the end of the development project, but the solution and its requirements persist through the operational and maintenance phases.

1. IIBA

A Guide to the Business Analysis Body of Knowledge (BABOK® Guide)

Version 3

2015. Section 5.3.2

Description

states

"Requirements may be retired when the solution or solution component they describe is retired." This directly supports that the end of the life cycle is tied to solution retirement.

2. IIBA

A Guide to the Business Analysis Body of Knowledge (BABOK® Guide)

Version 3

2015. Chapter 5

Requirements Life Cycle Management

Introduction

Paragraph 2

explains that this knowledge area "describes the tasks that business analysts perform in order to manage and maintain requirements... from inception to retirement."

3. IIBA

A Guide to the Business Analysis Body of Knowledge (BABOK® Guide)

Version 3

2015. Section 6.4

Assess Solution Limitations

describes the analysis performed to understand factors that may lead to a solution's retirement

reinforcing the concept of a complete solution life cycle which dictates the requirements life cycle.