Software Engineering

Validation confirmations at CDR:
Validation confirmations at TRR:
Structural configuration will satisty the
requirements baseline.
Requirements baseline continues to refelect
Functional architecture, as formulated,
Physical architecture has been configured
to achieve the functional architecture
specifications.
Software implementation plans adequately
address comprehension of the physical
architecture.
continues to satisfy the requirements
baseline.
stakeholder needs (incorporating approved
change proposals).
TRR
(Test readiness review)
Detailed architecture
definition
Unit
implementation
Component integration and
testing
FIGURE 15.1
V&V influence at milestone reviews.

---

265
15.1 
Define the V&V strategy
constraints. Verification also confirms the compliance of software implementation 
plans and execution against the physical architecture.
Validation
 confirms that the structural configuration will fulfill its intended use. 
This involves confirming that the integrated structural design will adequately per-
form data processing transactions under normal and extreme operational conditions. 
Validation assesses the physical architecture robustness to satisfy the requirements 
baseline, stakeholder needs, and operational workloads, and provides a stable 
framework for anticipated product evolution. This involves assessing the software 
response to end-user or external system failures, including failures associated with 
elements of the computing environment.
V&V tasks may be considered elements of a software quality assurance or test 
and evaluation effort. However, software quality assurance focuses on ensuring 
that policies and procedures are complied with, such as software design and coding 
standards. Test and evaluation often are focused on qualifying a software product 
or process against specifications and determining the readiness of the product for 
deployment. Therefore, the tasks identified within this chapter address V&V from 
a software engineering context. 
Figure 15.2
 provides an overview of the software 
V&V tasks.
These V&V tasks provide a comprehensive scope of verification and valida-
tion as they apply to establishing a meticulous, consistent, and achievable software 
product architecture. While there may be other software-related tasks that overlap 
these responsibilities, they are adjunct assignments that typically support associated 
software development concerns. V&V tasks are intended to legitimize the effec-
tiveness of the engineering merits of the software architecture. Therefore, the tasks 
identified within this chapter form the basis for discussing V&V within the soft-
ware engineering context.
V&V tasks are formulated to ensure that the software architecture is complete 
and internally coherent. The emphasis is on ensuring the structural integrity, dura-
bility, and simplicity of the software architecture. The V&V tasks are grouped into 
four primary activities, as follows: