Here are a few good online matrix calculator with steps free sites. You are able to find inverse, determinant, addition, subtraction of matrices, transpose, matrix multiplication, matrix power, and more. All that you have to do is actually add some values for the input matrix (or matrices) then select the output operation, which may be the addition, subtraction, transpose, etc. Next, you are going to get the output answer in a box.

There are lots of control measures available. If you tell your team to carry out a task wearing goggles to protect their eyes, that's a control measure. If you send staff on a training course to understand how to do something safely, that's a control measure. If you provide an item of equipment that makes the task safer, that's also a control measure.

Elimination is the best control measure you can use, to eliminate the risk from the task entirely. Of course, this is the best control measure, because you are removing the risk entirely. No risk, no danger, no chance of harm!

Now we know the best control measure, can you use this control for every risk and be the safest business in the world?

A key question for any risk assessment is, how exactly you are going to control the risks? After all, a risk assessment isn't just a list of the risks. It's an assessment. You are assessing the risk and deciding whether or not it is safe enough to proceed.

Once you have spotted the hazards involved and calculated the risks, you now need to get those risks under control. A successful risk assessment should check the existing precautions you have in place, and then decide if you need more to prevent harm.

Now we can calculate our risk level, from 1 (Very Low Risk) to 25 (Very High Risk) using the 5x5 risk matrix. Let's take our earlier example. A broken leg would be a major injury, but we estimated that it's not very likely to happen in the risk we are assessing. That would be unlikely (2) on our likelihood scale. And major injury (4) on our severity scale. Using the 5x5 risk matrix, we can see that gives us a medium risk.

You don't have to use a 5x5 risk matrix. You don't have to use a risk matrix in your risk assessments at all. If you choose to calculate risk as Low, Medium, High for example, you can keep things simple. If the likelihood of harm occurring is low, and the severity of the harm is low, then the risk is low. But not every risk is so straight forward. What is the risk level if the likelihood is low but the severity is medium?

A risk matrix is a way of representing your risk scale in a chart (aka matrix) to show the risk level. It helps you use your scale to quickly find out if a risk is high or low.