Which of the following is normally conducted before creating a Fishbone diagram?1. Brainstorming session2. Check sheets3. Sigma level calculation4. Balanced scorecard

1. Brainstorming session

Step-by-step explanation:

1. Brainstorming session: This is typically the first step before creating a Fishbone diagram. During a brainstorming session, team members gather to identify potential causes of a problem. This collaborative effort helps in generating a comprehensive list of ideas that can be categorized in the Fishbone diagram.

2. Check sheets: These are used to collect data and can be helpful in identifying patterns or frequencies of problems. However, they are usually employed after the brainstorming session to validate or quantify the causes identified.

3. Sigma level calculation: This is a measure used in Six Sigma to determine the performance of a process. It is not directly related to the creation of a Fishbone diagram but can be used later to assess the impact of identified causes on process performance.

4. Balanced scorecard: This is a strategic planning and management tool used to align business activities to the vision and strategy of the organization. It is not directly related to the creation of a Fishbone diagram.

Therefore, the correct answer is: 1. Brainstorming session.