productivity

You need to compare production rates per time period for the same part or task on different machines.

All components of the process including setup and removing time must be optimized or improved.

fine. thank you.

A little more info would be helpful.

Type of machine, process and product?

You will need to perform a "real time", time study of opperations and output of product. Setup time to convert any machine, or prep for production is not calculated in this out put study. You are only timing the actual function output. How many completed products are actually being delivered off the line.

Such as boxing machine, a boxing machine will take pre-loaded folded boxes and open, tape, and deliver a box to be loaded on a line.

Or a plastic bottle blow mold machine. It takes prelaoded blanks, heats and blows out a bottle. X product per minute, per hour, per day.

Real Time for a finished product. Which is your time to count and average over a set period of time to formulate your "Real Time Production Out Put".

Good luck and be patient with this type of task. It takes time to accuratly sum the finished product.

Maximo

With low rates of production you also need to calculate in the time involved and difficulty of programming the machine. The higher the rate of production the more this is spread out among the individual parts.

Small production runs can easily have more time to program and setup a job than it takes to actually produce the parts being made.

Scooter

How to calculate the productivity of a particular machine?

You have to be specific on what type of machine you wish to determine productivity.

If you have in mind only a single machine and you wish to calculate the productivity, then it might be quite simple. Normally, any type of production machine or equipment has a rated capacity or a given output of units per time. Example; if you have a bottle or can filling machine and it is rated at 350 bottles or cans per minute, but you only get an actual output of 300 cans/min. But also out of the 300 cans produced, you may have 5 cans rejected or damaged, so that your productivity may just be 295 cans/min.

However, productivity and efficiency more often always relate to each other. In the example above, efficiency is the ratio of the output or the 300 cans filled divided by the rated capacity of 350 cans. When efficiency is up, productivity normally goes higher.

If you wish to consider the whole system of a production line,it becomes a little more complex. In some cases, the labor required to attain a certain productivity level has to be considered.

Looks like Overall Equipment Effectiveness may be what your after. Below is one link out of many I found through a google search for OEE.

http://www.oee.com/oee_quick_guide-request.html