Risk Analysis & Assessment

7/30/2019 Risk Analysis & Assessment

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Risk Analysis & Assessment

4th IED

2012 - 2013

Prepared by :

Abdullah Essam Mohamed Sonosy

Ahmed Magdy Yahia Mohamed

Hajar Rajab

Presented to :Dr/ Eslam El Helaly


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Contents

Definitions

Hazard Analysis

Risk Matrices

Hazard Analysis Report

Example for Mini Baja


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Definitions

Safety: The condition of being safe; free from danger, risk, or injury.

Hazard: An activity or condition that is dangerous, that poses the threat of loss(property damage) or harm (personal injury or death).

Risk: The potential for loss or harm over time for a given hazard; the combination ofhazard severity and the exposure.

Severity: The degree of the loss or harm associated with a hazard.

Risk Tolerance: The acceptable of level of risk selected for all hazards.

Mitigation: An action taken or a feature adopted to reduce the risk for a hazard. Forexample, safety devices, guarding, warning devices, procedures, and training.

Hazard Assessment: A process of identifying and analyzing sources of danger.

Risk Analysis: A process of evaluating the severity of consequences and frequency ofexposure to hazards, and evaluating of risk tolerance and mitigation.

Risk Management: Activities related to monitoring and evaluating hazards tomaintain a given level of risk.


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Hazard Analysis

Steps in Hazard Analysis

1. Identify Risk Tolerance: Determine levels of acceptable risk.Create risk assessment matrix (risk level v. severity and exposure).

2. Hazard Assessment: Identify hazards by reviewing designs,

codes, standards, and interviewing workers and users.3. Evaluate SeverityandFrequency of Exposure: Assign

severity and frequency of exposure for each hazard.

4. Assign Risk Level: Categorize each hazard to a risk level using therisk assessment matrix.

5. Design Mitigation: Apply mitigation to hazards withunacceptable risk levels.

6. Repeat Hazard Analysis: Repeat until all hazards have anacceptable risk level.


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HA Flow Chart

Identify All Hazards

Risk Assessment Matrix

Determine Severity

and

Frequency of Exposure

Apply Mitigation

Assign Risk Level AcceptableUnacceptable

Next Hazard

For Each Hazard


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Risk Matrices

Risk matrices are probably one of the mostwidespread tools for risk evaluation. They are mainlyused to determine the size of a risk and whether ornot the risk is sufficiently controlled.

There are two dimensions to a risk matrix. These two

dimensions create a matrix. The combination ofprobability and severity will give any event a place ona risk matrix.


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Example :Risk Matrix


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Risk Analysis

Risk Level

(1) High

Imperative to reduce risk level.

(2) Medium Requires a mitigation plan.

(3) Low No special risk mitigation activities are required.

Severity of Consequences

(1) Catastrophic

Death or system loss.

(2) Critical - Severe injury or major system damage.

(3) Marginal - Injury requiring medical attention or system damage.

(4) Negligible - Possible minor injury or minor system damage.

Frequency of Exposure

(A) Frequent - Expected to occur frequently.

(B) Probable - Will occur several times in the life of an item.

(C) Occasional - Likely to occur sometime in the life of an item.

(D) Remote - Unlikely, but possible to occur in the life of an item.

(E) Improbable - So unlikely, it can be assumed occurrence may not be experienced.


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Section 1. Definition of Severity and Frequency ofExposure

Section 2. Risk Assessment Matrix

Section 3. Itemized list of Hazards, Initial RiskLevel, Mitigation and Final Risk Level


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Example: Mini-Baja HAR

Hazard No. Hazard Frequency Severity Initial Risk Level Mitigation Final Risk Level

Collisions

1 Other Driver error B 1 High Restraint system, bumpers, side & rear-view mirrors, training Medium2 Steering Failure D 2 Medium Heavy-duty rack & pinion, bumper to cover steering Low

3 Brake Failure D 1 High Emergency brake system, shut-off switches Medium

4 Operator error A 2 High Restraint system, padded frame structure, bumpers, training Medium

5 Rough terrain B 3 Medium Restraint system, padded frame structure, training Low

Fire

6 Fuel spill C 2 High Firewall, fire extinguisher, looped fuel line system Low

7 Engine damage D 3 Low Firewall, debri guard Low

8 Welding error C 2 High Welding masks & gloves, fire extinguisher, isolated welding area Low

Projectiles9 Debris from terrain B 3 Medium Mud-guards, debri wall for whole cockpit Low

10 Chain failure B 3 Medium Transmission cage Low

11 Suspension failure D 3 Low Suspension limiters, bumper guards Low

12 Engine explosion D 1 High Firewall, Engine cage, eye protection when working with engine Medium

Frequency of Exposure Severity

Catastrophic (1) Critical (2) Marginal (3) Negligible (4)

Frequent (A) A1 A2 A3 A4

Probable (B) B1 B2 B3 B4

Occasional (C) C1 C2 C3 C4

Remote (D) D1 D2 D3 D4

Risk Levels High Medium Low

1 Catastrophic major injury to driver, spectators

2 Critical damage to property, and/or minor injury

3 Marginal damage to vehicle only

4 Negligible reparable damage to vehic le only, no injuries

A Frequent every time it is driven

B Probable with every race

C Occasional during/following repair

D Remote not expected during the life of the vehicle


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Example: BattleBot HAR

Hazard No. Hazard Description Initial Risk Category Initial Risk Level Mitigation Final Risk Category

Collision

1 transmitter failure 1C Medium fail safe mechanism 3C

2 receiver failure 1C Medium fail safe mechanism 3C

3 controller failure 1C Medium fail safe mechanism 3C

4 driver error 1C Medium training 2C

5 accident 2C Low no necessary mitigation required 2C

Pneumatics

6 seal failure 1C Medium must have a burst disk 3C

7 tank failure 1C Medium protection on all sides 2C

Battery

8 Burns 2C Low no necessary mitigation required 2C

9 Shock 2C Low no necessary mitigation required 2C10 Fire 1C Medium must be insulated from electrical components and pneumatics 3C

Motors

11 Shock 2C Low no necessary mitigation required 2C

Weapon

12 misfires 1C Medium safety restraints 3C

13 operator error 1C Medium training 3C


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Thanks

Risk Analysis & Assessment

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