Business scenarios are a technique recommended by the TOGAF ADM for use in developing an Architecture Vision document12. Business scenarios are a means of capturing the business requirements and drivers, the processes and actors involved, and the desired outcomes and measures of success34. Business scenarios help to create a common vision and understanding among the stakeholders, and to identify and validate the architecture requirements . Business scenarios also provide a basis for analyzing the impact and value of the proposed architecture. References:
*The TOGAF Standard, Version 9.2 - Phase A: Architecture Vision - The Open Group
*TOGAF Standard - Introduction - Phase A: Architecture Vision
*The TOGAF Standard, Version 9.2 - Definitions - The Open Group
*Business Scenarios - The Open Group
*[The TOGAF Standard, Version 9.2 - Architecture Requirements Specification - The Open Group]
*[The TOGAF Standard, Version 9.2 - Architecture Vision - The Open Group]
*[The TOGAF Standard, Version 9.2 - Business Transformation Readiness Assessment - The Open Group]

Business scenarios are a technique for capturing, clarifying, and communicating the functional and non- functional requirements of a system. Business scenarios describe the business environment, the actors involved, the desired outcomes, and the processes or rules that govern the behavior of the system. Business scenarios are useful for ensuring that the architecture addresses the real needs and concerns of the stakeholders, and for validating and testing the architecture against expected situations. Business scenarios are developed in Phase A: Architecture Vision of the ADM cycle, and refined and updated throughout the other phases3 References: 3: The TOGAF Standard, Version 9.2, Part III: ADM Guidelines and Techniques, Chapter 26: Business Scenarios : The TOGAF Standard, Version 9.2, Part II: Architecture Development Method (ADM), Chapter 18: Phase A: Architecture Vision

Risk is defined as the effect of uncertainty on objectives, according to the ISO 31000 standard, which provides principles and guidelines for risk management1 Risk can be positive or negative, depending on whether the uncertainty affects the achievement or the failure of the objectives. Risk can also be expressed in terms of likelihood and impact, which indicate the probability and the consequence of the risk occurrence.
Risk management is the coordinated activities to direct and control an organization with regard to risk. Risk management is an integral part of the TOGAF standard, as it helps to identify, assess, and treat the risks that may affect the architecture development and implementation2 References: 1: ISO 31000:2018, Risk management - Guidelines, Clause 3.1 2: The TOGAF Standard, Version 9.2, Part III: ADM Guidelines and Techniques, Chapter 32: Risk Management

The purpose of the Preliminary Phase is to architect an Enterprise Architecture Capability that meets the needs and expectations of the enterprise's stakeholders and supports and enables subsequent phases of architecture development and transition. This phase involves defining the scope, principles, framework, and governance for the Enterprise Architecture Capability. Reference: The TOGAF Standard | The Open Group Website, Section 3.2 Preliminary Phase.