Machine Safety: Does it matter, the Aggregate Hazard Level for a machine?

When conducting a risk assessment of the machine’s individual identified hazards does the safety level of the complete machine or system matter? Does anyone have a solution for determining the aggregate level of an entire machine? Does anybody care?

03/23/2012


When conducting a risk assessment of the machine’s individual identified hazards does the safety level of the complete machine or system matter? Does anyone have a solution for determining the aggregate level of an entire machine? Does anybody care? 

Safety matters logo.

   Over the past two or three years we’ve engaged in abundant discussions over the increased value of migrating from qualitative measures for machine hazard analysis and mitigation versus quantitative measures. Stage right – enters ISO 13849-1&2 for a comprehensive quantitative approach that analyzes and mitigates machine hazards to acceptable levels. Clients now ask, why does the new more comprehensive approach stop short of determining the aggregate machine level or system level of hazard? Does anyone anywhere roll up the risk analysis to an aggregate level?

   In my opinion, a few disciplines do exactly that!

   Let’s list several disciplines that identify an aggregate risk level:

1. Disaster recovery

2. Environmental polution

3. Information Technology

4. Banking

5. Defense

6. Insurance

... to mention a few

   So, if management in these sectors can get aggregate levels of risk analysis why can’t management of manufacturing operations machinery based? Isn’t it possible for management to know a risk level by machine? Why roll out a quantitative analysis for hazards on and around a machine only for use by the EH&S, engineering, and maintenance personnel. This leaves management thirty years behind with qualitative awareness’s kept in their minds. How about providing management with an aggregate machine hazard level by something like:

1. The value of the highest mitigated hazard, or

2. The summation average of all mitigated hazards, or

3. A proportional average of all mitigated hazards, or

...something else?

   A manager of manufacturing operations should know his aggregate hazard level (SIL, PL, etc.) by machine just like his pier in the IT office? What have you found or what are you using to answer this call? Doesn’t this make sense?

   Your comments or suggestion are always welcome so please let us know your thoughts. Submit your ideas, experiences, and challenges on this subject in the comments section below. Click on the following text if you don't see a comments box, then scroll down: Machine Safety: Does it matter, the Aggregate Hazard Level for a machine?

   Related articles:

Updating Minds About Machine Safety

EN ISO 13849-1, the quantitative approach to machine safety begins with a qualitative process!

How To Integrate Safety

Machine Safety – the myths of safety cultures.

Contact: www.jbtitus.com for “Solutions for Machine Safety”.



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Intelligent, efficient PLC programming: Cost-saving programming languages are available now; Automation system upgrades; Help from the cloud; Improving flow control; System integration tips
Smarter machines require smarter systems; Fixing PID, part 3; Process safety; Hardware and software integration; Legalities: Integrated lean project delivery
Choosing controllers: PLCs, PACs, IPCs, DCS? What's best for your application?; Wireless trends; Design, integration; Manufacturing Day; Product Exclusive
PLCs, robots, and the quest for a single controller; how OEE is key to automation solutions.
This article collection contains several articles on improving the use of PID.
Learn how Industry 4.0 adds supply chain efficiency, optimizes pricing, improves quality, and more.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again

(copy 5)