Q1. Why do we need safety measures?

A: Mainly to protect people from risks, which consequently aims to improve the productivity of the industry.

As seen in the Industrial Revolution, etc., people have made full use of the wisdom and knowledge they have cultivated across many years to improve their productivity while streamlining their work in response to changes in the times.
In modern times, machines and robots are more often able to work on behalf of humans, and it has become important to consider the safety of machines and humans in order to increase productivity.
The background of this thought process is based on the ideas that people make mistakes and machines break, and we take solid safety measures so that even if a machine or robot breaks down, it will not harm people. In other words, this is a way to protect people from risks and, as a result, increase productivity.

Q2. What is the difference between safety measures and safety measures?

A: Safety plans are plans and measures to prevent risks and dangers before they happen.

On the other hand, safety measures are measures considered and taken as a response after an accident or disaster occurs.
Especially at production sites, it is of utmost importance to make safety plans to prevent accidents before they happen.

Q3. What is risk assessment?

A: It is analyzing the danger and harmfulness of an operation. In other words, identifying hazards and connecting them to countermeasures.

In an operation, the first step in creating a safety plan is to consider that potential dangers exist, even if they did not occur at that time. Conversely, if these are left unattended, there is thought to be a high possibility of an accident or disaster.
Risk assessment considers potential hazards, analyzes danger and harmfulness, and takes the appropriate steps to ensure workers are safe from them and reduce risks as much as possible.

>> Risk assessment

Q4. What does the "identification" in "identifying a risk source" mean in the risk assessment procedure?

A: Finding a hazard by checking a list of them.

The meaning of the word "identification" means "the act of searching for the attribution of an object from the existing classifications related to it".
In risk assessment, 'identification' is considered distinct from 'identification' and 'extraction'.Since it takes a lot of time and effort to identify all hazards in the course of work, we check the list of hazards in advance in the international safety standards and confirm whether there is any danger one by one. find the source of danger.This action is called "identification" because it refers to performing it while comparing it with the hazard list.

Q5. What are the estimation methods in risk assessment?

A: There are various estimation methods.

Risk estimation is one step in risk assessment, and it mainly involves identifying a risk source and then determining its risk factors. It is also about determining what risks exist and how much of a priority they are.
There are many ways to estimate risk, but the main ones are:

1. Selection method
The most typical method is to select the magnitude of "serious injury", “frequency of exposure to danger”, and "possibility of avoiding danger" to finally determine the risk.

2. Matrix method
It is the simplest way to determine risk, done by combining two parameters.

3. Addition method
It is a method of quantifying risks, attributing scores to some parameters, and using the total to determine the risk.

4. Accumulation method
This is a method of attributing scores to several parameters and multiplying them to determine the risk.

Q6.The 13849 edition of ISO2023 has been published. What are the main changes?

A: There are no changes to the procedure for evaluating safety-related parts of control systems.

The procedure for determining PLr, selecting categories, calculating MTTFD and DC, evaluating CCF using a checklist, and confirming the validity of PL by integrating these is the same.
The number of annexes has increased, such as adding terms, changing the scope of PL e, and adding an EMI checklist (informative).

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