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According to the TOGAF standard, the need for the ADM process to be governed is to ensure that the architecture development and implementation activities are conducted in a consistent, coherent, and compliant manner1.Governance provides the means to verify that the method is being applied correctly and effectively, and that the architecture deliverables and artifacts meet the quality and standards criteria1. Governance also enables the management of risks, issues, changes, and dependencies that may arise during the ADM process1.Some of the benefits of governing the ADM process are2:Improved alignment of the architecture with the business strategy and objectivesEnhanced stakeholder engagement and communicationIncreased reuse and integration of architecture assets and resourcesReduced complexity and duplication of architecture effortsIncreased agility and adaptability of the architecture to changing needs and requirementsImproved compliance and auditability of the architecture outcomes and outputs

Gap Analysis is a technique that compares the Baseline Architecture and the Target Architecture to identify the differences and gaps between them. The purpose of this technique is to determine the changes and additions that are required to achieve the desired future state of the architecture. One of the main aspects of Gap Analysis is to identify the functions that are missing or overlapping in the current and future architectures, and to plan how to address them.This helps to ensure that the architecture is complete, consistent, and aligned with the business objectives and requirements3

Statements 1 and 3 highlight the value and necessity for Architecture Governance to be adopted within organizations. Architecture Governance is the practice and orientation by which Enterprise Architectures and other architectures are managed and controlled at an enterprise-wide level12. It ensures that architectural decisions are aligned with the organization's strategy, objectives, and standards. Architecture Governance also involves establishing and maintaining processes, decision-making, and mechanisms to avoid or minimize potential conflicts of interest, such as between different stakeholders, business units, or projects34. Moreover, Architecture Governance requires transparency and accountability for all actions implemented and their decision support, so that they can be inspected and evaluated by authorized parties, such as auditors, regulators, or customers5 .Reference:The TOGAF Standard, Version 9.2 - Architecture Governance - The Open GroupArchitecture Governance - The Open GroupTutorial: Governance in TOGAF's Architecture Development Method (ADM)Architecture Governance in TOGAF: Ensuring Effective Management and ComplianceThe TOGAF Standard, Version 9.2 - Definitions - The Open Group[Architecture Governance in TOGAF: Ensuring Alignment and Control]