Introduction

Once the prerequisites of Clause 4 are in place — defining context, assigning roles, and securing management commitment — the organization can begin the practical journey of performing the Business Impact Analysis (BIA).

Clause 5 of ISO/TS 22317:2021 outlines the step-by-step process to conduct the BIA, starting with Clause 5.1 (Fundamentals) and Clause 5.2 (Plan BIA).
These two sub-clauses establish the operational foundation for a successful, evidence-based and time-bound BIA.

Clause 5.1 — Fundamentals of the BIA Process

Purpose

Clause 5.1 defines why the BIA process exists — to prioritize activities, resources, and recovery objectives so that the organization can resume product and service delivery within acceptable timeframes after a disruption.

The goal is not just to collect data but to create a statement of business continuity priorities and requirements, forming the basis for continuity strategies under ISO 22331 and for the BCMS required by ISO 22301.

Key Principles

To comply with Clause 5.1, organizations must ensure that their BIA process is:

Structured and Repeatable

The same methodology and impact criteria must be applied consistently across all departments.
This ensures comparability, credibility, and auditability of results.

Quality-Driven

Information collected must be accurate, verifiable, and complete. ISO 22317 highlights the “five C's” of quality data:

· Correct - Based on factual operational data

· Credible - Reasonable and justifiable

· Consistent - Comparable across activities

· Current - Up to date

· Complete - Comprehensive in scope

Timely and Balanced

The process must strike a balance between completeness and timeliness — it should not stall because some information is incomplete.

A partial but validated BIA is more valuable than a delayed one.

Outcome-Oriented

The final outcome of the Fundamentals phase should be a BIA Implementation Plan, defining how the process will be executed, who will be involved, and how outputs will be analyzed and presented.

Why Clause 5.1 Matters

Crest Advisory Africa emphasizes that compliance with Clause 5.1 ensures that the BIA delivers strategic business intelligence, not just operational data.
It enables leadership to make informed decisions on resource allocation, recovery strategies, and risk appetite.

In practice, this means the BIA becomes a living management tool — directly supporting corporate governance, combined assurance, and business resilience frameworks.

Clause 5.2 — Planning the BIA

Purpose

Clause 5.2 translates the fundamentals into action.
It defines the planning tasks that ensure the BIA is properly resourced, scheduled, communicated, and approved before execution begins.

Key Planning Activities

To comply with Clause 5.2, organizations should perform the following structured tasks:

· Allocate Resources

· Appoint a BIA Leader and a cross-functional BIA team.

· Allocate time, budget, and tools (e.g. BIA questionnaires, analysis templates, and software platforms such as ISOLTX).

Group Products and Services

· Identify all products and services within the BCMS scope.

· Group them logically by type, geography, customer segment, or process dependency.

· This simplifies impact analysis and ensures scalability for large organizations.

Map the Organizational Structure

· Identify which departments, teams, or individuals provide input for each product/service group.

· Develop a communication plan to coordinate data collection and interviews.

Communicate Expectations

· Provide clear guidance to participants on what information is required, how it will be used, and how confidentiality will be maintained.

· Crest Advisory Africa recommends issuing a BIA Communication Brief to all Activity Owners before workshops or surveys begin.

Establish a BIA Plan and Timeline

The plan should specify:

· Objectives of the BIA process

· Milestones and deliverables (kick-off meeting, data collection, validation, analysis, approval)

· Approach and methodology (e.g. questionnaires, interviews, or workshops — see Annex B of ISO 22317)

Approval checkpoints with management

· Gain Formal Approval of the BIA Plan

· Top management must review and approve the BIA plan prior to execution.

· This step ensures that leadership ownership — established in Clause 4.4 — continues into the operational phase.

Expected Outputs from Clause 5.2

By completing Clause 5.2 correctly, the organization should produce the following tangible outputs:

Practical Compliance Insights

Crest Advisory Africa's consulting practice highlights several best-practice considerations when implementing Clauses 5.1 and 5.2:

Integrate the BIA Plan into the broader Business Continuity Roadmap to ensure alignment with strategy and risk appetite.

Use the P²ST² Methodology (People, Processes, Systems, Technologies, Tools) to capture all dependencies consistently.

Leverage digital GRC platforms like ISOLTX BIA Module to streamline data collection, workflow approvals, and real-time dashboards.

Document every step — ISO auditors require evidence of both process control and management sign-off.

Conclusion

Clauses 5.1 and 5.2 of ISO/TS 22317:2021 transform the BIA from a theoretical requirement into an operational process underpinned by structure, consistency, and governance.

Together, these clauses ensure that:

The methodology is sound,

The process is planned and controlled, and

The results are credible, auditable, and actionable.

When implemented with the rigor promoted by Crest Advisory Africa, Clauses 5.1 and 5.2 ensure that the BIA becomes not merely a compliance exercise — but a strategic enabler of resilience and performance certainty.