Root Cause Analysis Series- Step 2 (Option C): Interrelationship Diagram

Root cause analysis (RCA) consists of a group of problem-solving methods aiming to uncover the core causes of an identified problem. Once root causes are determined, teams then select appropriate, well-matched solutions based on a number of factors. Conducting a root cause analysis is ideally a collaborative effort among teams, where a variety of tools and strategies are used to facilitate the process of uncovering the root of the identified problem or challenge to be addressed.

There are several methods and associated tools for the process of root cause analysis, each with a unique set of benefits, drawbacks, and situations where its use is more appropriate. “The intent of the Interrelationship Diagram (ID) is to encourage practitioners to think in multiple directions rather than linearly so that critical issues can emerge naturally rather than follow personal agendas… The ID uses arrows to show cause-and-effect relationships among a number of potential problem factors.”1

The steps in this toolkit are:

Step 1: Problem Definition

Step 2: Problem Exploration (An introduction to causal analysis is provided, alongside 3 options for completion)

Step 3: Implementing Solutions

Step 4: Testing Chosen Strategies

1 Doggett, A. M. (2005). Root Cause Analysis: A framework for tool selection. Quality Management Journal, 12(4), 34–45. https://doi.org/10.1080/10686967.2005.11919269