Is doing safety courses like Nebosh and Iosh or quality management courses like Six Sigma a good option after studying mechanical engineering?

NEBOSH stands for “National Examination Board in Occupational Health and Safety. It is UK based independent examination board providing certification in health, Safety, and Environment. This course provides broader knowledge on risk management, health, and safety.

IOSH stands for “Institution of Occupational Safety and Health.” It’s professional health and safety membership forum, conducts training for managers, supervisor. This training will help managers to take appropriate action to handle practical situations.

Both NEBOSH and IOSH are relevant if you are looking for long term career in health and safety.

Now, let’s look at Six Sigma relevance.

Six Sigma is a data-driven methodology first introduced in the 1970s. Six Sigma is based on data analysis, hence helps in reducing risk which one of the many reasons that Six Sigma is still preferred over other improvement methodologies. The objective is to remove defects at the source and bring down performance to ‘six sigma’ level i.e. 3.4 defects for every one million opportunities. Continuous effort is made to achieve stable and predictable process.

Jack Welch made it the center of business strategy at General Electrical. In today’s competitive world, Six Sigma has widely accepted as a philosophy for growth across different sectors.

Six Sigma applies to all departments and industries. It has a very broad scope. So, professionals at all level are taking this course to improve day-to-day business and hence their performance.

Long answer short, my recommendation is you should go for Six Sigma course.


What is throughput time? Is it the same as lead time?


Throughput time is not a widely used word in Lean Six Sigma world.

‘Throughput’ is the number of items produced by a process in a given period of time. And ‘Cycle time’ is the average time required to produced one item by a process.

So if for Process A, cycle time is 10 mins per item.

Throughput of the process will be 6 items per hour.

Lead time is the time required to deliver final product to the client, i.e. time lag between initiation and completion of the request.

Assume, for A Process A, a request was raised on 20-Mar and product delivered to client on 22-Mar, the lead time is 2 days while the cycle time is only 10 mins, which means for rest of the time the request Is actually waiting in the queue for some reason/s. This gives you an opportunity for process improvement.

Another concept worth understanding is Takt time.

Takt time is the rate at which process should run in order to meet customer demand.

For example, on a particular day for Process A, the demand is 100 items.

Assuming 2 people working for 8 hours per day:

Total available time = 2*8 = 16 hours = 960 mins

Takt time = [Time available] / [ Number of units to be processed] = 16 hours / 100 items

= 9.6 mins per item

So with the current cycle time of 10 mins, you won’t be able to achieve demand. Hence the cycle time should always be less than takt time. Now, you can run another project to reduce process cycle time to 9.6 mins per item.

What is throughput time? Is it the same as lead time?