Information Document - Risk Calculator

Using the "Risk Calculator“

In addition, to manually setting the Risk level, eDrops has a built-in "Risk Calculator" feature.
The Risk Calculator calculates your current inspection's potential consequence and risk level.

Use the "About method" information to learn more about the method used to calculate risk
(source: https://www.dropsonline.org/resources-and-guidance/drops-calculator/)

Also, notice that the Risk Calculator lets you calculate in both "Metric" and "Imperial" units.

Finally, you enter the item’s approximate Weight and Height value.

Please notice, as a part of the input session, the calculator also asks if there is a functional safety securing on the item. This is a mandatory assessment that you make before calculating the risk

In detail

About Method

The DROPS Calculator provides a common benchmark in the classification of the potential consequences of a dropped object.

One of a number of similar tools, the DROPS Calculator is endorsed by the DROPS Workgroup and recognized by the majority of Operators and Contractors in the global oil and gas sector. While other ‘calculators’ exist, they all follow the same principle:

– plotting the mass of a dropped object against the distance it falls to determine its possible consequences.

Considerations:

With light objects (<0.1 kg) a key influencing factor is the effect of an object punching the skin and damaging tissue/organic functions. The calculator assumes a blunt object so is not compatible with broken glass, metal shards, etc.
The wearing of standard PPE, e.g. hard hat, safety boots, and eye protection, is assumed in the calculator.
Do not subtract the height of an individual, measure fall distance to solid deck/ ground level.
The DROPS Calculator is to be considered as a guide only providing a cursory indication of the possible outcome – the DROPS Calculator is not an accurate prediction.
REMEMBER:
In reality, even a small object falling from height can be lethal.

More about:

Calculating Dropped Objects Potential Consequences

JOULES AND THE 40 JOULE RULE

The Joule is a unit of energy equal to the work done by a force of one newton acting through one meter.

In terms of dropped objects, it is recognized that any blunt object achieving 40 Joules or more in fall energy
is likely to result in a Recordable incident or worse on impact with an unprotected human body (e.g. no PPE).

Example:

200g Machine Bolt falling 27 m = 53 Joules
(0.2[kg] x 27[m] x 9.8[g] = 53 J ).

Regarding how the Risk calculator calculates risk based on the different values depending question:
“Is there a functional safety securing on the item?” (Yes or No)

Together with Axess Digitals clients, we decided to use the Likelihood column:

“UNLIKELY” and “LIKELY” in the Risk Matrix as a basis for calculating the risk level.

The Risk Matrix is presented and validated by our clients that use this Matrix for Vulnerability assessment.

This is how the Risk Calculator calculates the different risk levels, depending on the values on the question:

“Is there a functional safety securing on the item?” (Yes or No)

Previous Slide Next Slide Created By Fredrik Eriksson Version Number 1 Created Date 04.06.2022

Revision date

04.06.2022