How To Calculate Risk Assessment | Download PPT

How To Calculate Risk Assessment | Download PPT
Photo by RDNE Stock project on

How To Calculate Risk Assessment | Download PPT

Risk assessment is a systematic process of identifying, evaluating, and controlling potential risks in various activities or environments. It plays a crucial role in ensuring safety and minimizing accidents or hazards. When it comes to activities like working at heights, risk assessment becomes even more critical due to the increased potential for serious injuries or fatalities.

Introduction to Risk Assessment

Risk assessment involves assessing the likelihood and severity of potential hazards and determining appropriate control measures to mitigate these risks. It is a proactive approach aimed at preventing accidents and ensuring the safety of workers and individuals involved in various activities.

Importance of Risk Assessment

Effective risk assessment is essential for several reasons. Firstly, it helps in identifying potential hazards before they result in accidents or injuries. By anticipating risks, appropriate measures can be taken to eliminate or minimize them, thus reducing the likelihood of accidents. Additionally, risk assessment promotes compliance with safety regulations and standards, which is crucial for maintaining a safe work environment.

Components of Risk Assessment

Risk assessment typically consists of three main components:

Identification of Hazards

The first step in risk assessment is identifying potential hazards associated with a particular activity or environment. Hazards can include anything that has the potential to cause harm, such as slippery surfaces, falling objects, or electrical hazards.

Evaluation of Risks

Once hazards have been identified, the next step is to evaluate the risks associated with each hazard. This involves assessing the likelihood of an incident occurring and the potential severity of the consequences.

Risk Control Measures

Based on the evaluation of risks, appropriate control measures are implemented to mitigate or eliminate the identified hazards. This may involve implementing safety procedures, providing personal protective equipment (PPE), or modifying the work environment to reduce risks.

Understanding Work at Height Activities

Working at height refers to any work that is performed above ground level, where there is a risk of falling and causing injury. This includes activities such as construction work, maintenance, and repair work conducted on elevated surfaces or structures.

How to Calculate Risk Assessment

To calculate risk assessment, you typically follow these steps:

  1. Identify hazards: Identify all potential hazards associated with the activity or situation. This involves observing, inspecting, and reviewing relevant information.
  2. Assess risks: Evaluate the likelihood and consequences of each identified hazard. Determine the level of risk by considering factors such as frequency of exposure, potential harm, and existing control measures.
  3. Control measures: Develop and implement control measures to eliminate or reduce risks to an acceptable level. This may involve engineering controls, administrative controls, or personal protective equipment (PPE).
  4. Review and monitor: Regularly review and monitor the effectiveness of control measures. Update the risk assessment as needed to address any changes or new hazards.
Here's a sample example of a risk assessment for a work at height activity:

Work at Height Risk Assessment Example:

1. Identify Hazards:

  • Falling from height
  • Objects falling from height onto workers or pedestrians below
  • Structural instability of platforms or scaffolding
  • Adverse weather conditions (e.g., wind, rain)

2. Assess Risks:

  • Likelihood:
    • High likelihood of falling due to working at elevated levels.
    • Medium likelihood of objects falling if proper precautions are not taken.
    • Low likelihood of structural instability if proper maintenance and inspections are conducted.
    • Likelihood of adverse weather conditions depends on location and season.
  • Consequences:
    • Falling from height can result in severe injury or fatality.
    • Objects falling can cause injuries to workers or pedestrians below.
    • Structural instability can lead to collapse and potential injuries.
    • Adverse weather conditions may increase the risk of slips and falls.

3. Control Measures:

  • Use of appropriate fall protection equipment such as harnesses, guardrails, or safety nets.
  • Secure tools and materials to prevent objects from falling.
  • Regular inspections and maintenance of platforms, scaffolding, and ladders.
  • Monitor weather forecasts and reschedule work if adverse conditions are anticipated.
  • Provide training to workers on proper procedures and safety precautions.

4. Review and Monitor:

  • Regularly inspect equipment and work areas for any hazards.
  • Conduct toolbox talks or safety meetings to reinforce safe practices.
  • Investigate and address any incidents or near misses promptly.
  • Update risk assessment as necessary based on changes in conditions or procedures.
By following these steps, organizations can effectively manage risks associated with work at height activities and ensure the safety of their workers.
let's calculate the risk level for each identified hazard in the work at height activity example:

1. Falling from height:

  • Likelihood: High
  • Consequences: Severe (injury or fatality)
  • Risk Level: HIGH

2. Objects falling from height:

  • Likelihood: Medium
  • Consequences: Moderate (injuries to workers or pedestrians)
  • Risk Level: MEDIUM

3. Structural instability of platforms or scaffolding:

  • Likelihood: Low
  • Consequences: Severe (collapse and potential injuries)
  • Risk Level: MEDIUM

4. Adverse weather conditions:

  • Likelihood: Varies (depending on location and season)
  • Consequences: Moderate (increased risk of slips and falls)
  • Risk Level: LOW to MEDIUM (depending on severity of weather conditions)
Based on this assessment, the overall risk level for the work at height activity would be categorized as MEDIUM to HIGH, with certain hazards posing greater risks than others. It's essential for organizations to implement appropriate control measures to reduce these risks to an acceptable level and ensure the safety of workers involved in such activities.

THE FACTORIES ACT 1948 Section 40 (B) Safety Officers | Download PPT

Scaffolding Technical Specification | Download PPT

44 HSE Interview Questions and Sample Answers | Download PDF

PSSR for Safety | Pre-Startup Safety Review (PSSR) | Download PPT

Pre-Start Task Analysis (PSTA) | Download PPT


Risk assessment is a crucial aspect of ensuring safety in various activities, particularly those involving work at height. By systematically identifying, evaluating, and controlling potential risks, organizations can create safer work environments and minimize the likelihood of accidents or injuries.


  1. Why is risk assessment important in work at height activities? Risk assessment helps identify potential hazards and implement appropriate control measures to prevent accidents and injuries.
  2. What are some common hazards associated with working at heights? Common hazards include falls from height, falling objects, unstable surfaces, and inadequate access or egress.
  3. How is risk assessment conducted for work at height activities? Risk assessment involves identifying hazards, evaluating risks, and implementing control measures specific to the nature of the work and the environment.
  4. What is a risk assessment matrix, and how is it used? A risk assessment matrix is a tool used to evaluate the likelihood and severity of potential risks and assign them a risk rating, helping prioritize control measures.
  5. How can organizations ensure effective risk control in work at height activities? Effective risk control involves implementing appropriate safety measures, providing adequate training and supervision, and regularly reviewing and updating risk assessments.


Please enter your comment!
Please enter your name here