Industrial Safety Inspections and Accident Analysis

Questionnaire 3

1. Definition of a Safety Inspection

A detailed examination of working conditions to detect risks of accidents caused by unsafe practices, hazardous conditions, or dangerous materials.

2. Key Concepts

• Dangerous Material Condition: Risks associated with facilities and machinery.
• Unsafe Practice: Actions taken by people operating machines or facilities.

3. Data Required for Industrial Accident Classification

To ensure effective prevention, we must identify who, what, how, and why an accident occurred.

Regarding the Injured Person:

• Staff qualification
• Seniority in the workplace
• Duration of injury
• Age

Regarding the Accident:

• Cause of the accident
• Part of the material agent involved

4. Statistical Indices for Accident Reporting

• Incidence Index (II): (Total number of accidents / Number of employees) * 1,000
• Frequency Index (IF): (Total number of accidents / Total hours worked per person) * 1,000,000
• Severity Index (IG): (Number of days lost due to accident / Total hours worked per person) * 1,000

5. Concept of Accident Research

A technique used for in-depth analysis of an accident that has already occurred to understand the sequence of events and determine the root cause.

6. Larbi Method for Accident Investigation

A methodology that maps the chain of circumstances occurring directly or indirectly prior to the accident.

Possible Situations:

• First: Fact X has only one precedent; without it, the accident does not occur.
• Second: Fact X causes Y, which leads to Z.
• Third: Facts X1 and X2 are required for Y to occur.
• Fourth: No relation between X and Y; both can occur separately.

Questionnaire 2

8. Fine Method: Degree of Danger and Justification

Degree of Danger (GP):

GP = C * E * P

• C = Consequences (1 to 50)
• E = Exposure (0.5 to 10)
• P = Probability (0.5 to 10)

Degree of Justification (J):

J = GP / (GC * FC)

• GP = Degree of dangerousness
• FC = Factor cost (0.5 to 10)
• GC = Degree of correction (1 to 6)