Q&A

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.

Identification means "the act of searching for an attribute of a specific subject from existing classifications related to it.” It takes a huge amount of labor and time to identify all hazards in operations, so we browse the hazard list already in the international safety standards and check for them one by one. This is called identification because it refers to checking the list of hazards.

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.What are the main differences between the 13849 version and the 1999 version of ISO2006?

A: The factors that determine the safety of the control system are different.

In the 1999 version, the safety of the safety-related part of the control system (the part that executes the safety function of a function) was judged mainly by its "configuration", whereas in the 2006 version, reliability that affects life span and other factors were added, making it possible to distinguish between even differences in frequency of use and load conditions.
In an extreme case, if two control systems had the same configuration, even if the parts were unreliable, their ability to maintain their safety functions would have been considered to be the same even if the frequency of use and load conditions were different. Their reliability was not taken into consideration.

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