1. The Open Group. (2022). The TOGAF® Standard
10th Edition. Van Haren Publishing.
Section 21.1
Introduction to Gap Analysis: "A key step in validating an architecture is to consider what may have been forgotten. The architecture is checked against the business requirements to ensure all the requirements have been met. A gap is a statement of difference between two states. In the context of the TOGAF ADM
gap analysis is the technique of identifying the gaps between the Baseline and Target Architectures."
Section 21.2
Gap Analysis Matrix: This section details how the matrix is used to identify building blocks that are "New"
"Eliminated"
or "Included" (both existing and to be modified)
which directly relates to identifying missing or overlapping functions.
2. Pennsylvania State University. (n.d.). EA 871: Enterprise Architecture Foundations I
Lesson 8: Phase B: Business Architecture. Penn State College of Information Sciences and Technology.
In the courseware discussing TOGAF Phase B
it is stated: "The purpose of the gap analysis is to highlight services and/or functions that are to be carried over
services and/or functions that are to be eliminated
and services and/or functions that are new." This supports the identification of missing (new) or overlapping (to be eliminated) functions.