Standard Times and Cycle Times Information

[FL2006]

Hi,where can I find more info regarding standard times? TKS

[wmarhel]

Originally Posted by FL2006

Hi,where can I find more info regarding standard times? TKS

What information are you looking for in particular? How to set standard times, benefits, definition of, etc.? Some more information is necessary to answer your question.

There can also be confusion between the use of cycle times and standard time depending on the organization. Some people use cycle times specifically for machines, some don't.

Wayne

[FL2006]

This is EMS related! You have a workbench with tools needed to add value to a product! The cycle time is the time measured between to product that are being released from this step trough an Out area (there are IN and OUT areas on most of value add steps).My question is how should I measure standard time? Is it the work done by human factor trough all the steps or should I consider machine time also! Let’s say I have a step of electrical testing. The cycle time is a sum of the times: time that machine is doing the testing and the time that the human factor is preparing the product for testing. What the standard time will be for the whole product?
TKS

[triner]

Cycle time is fairly easy to calculate as you stated. Its simply the total time taken ,between successive parts. Easy to measure, time how long it takes to produce 10 parts, divide by 10 and you get the average cycle time for each part.

Standard time depends upon the context, for example is this standard time being used for costing purposes or an incentive rate? In general standard time can be calculated using either predetermined times, or time studies. The key with both of these approaches is the estimate of the work pace of the person doing the job. Standard work in the strictest sense is based on the time it will take an average person working at an average pace (defined as 100%) to perform a task. Standard time also has factors built into it such as personal and fatigue to account for the fact that a person can not sustain this pace for an 8 hour day.

It is the addition of these allowances such as personal and fatigue which make standard time a fuzzy number and a number that should use with caution.

To further complicate things, you have to deal with the interaction between the operator and the machine since some tasks are performed concurrently with the machine (internal work) and other tasks are performed with the machine down (external work).

Typically, industrial engineers are the type of people of who are trained to develop standard times.

Bottomline - unless you are using this time for costing or incentive pay, stick to measuring cycle time

[wmarhel]

Triner did a good job of answering your questions, but for "Cycle Time" it is important to view the cycle as: The START of one unit, until the START of the next unit. Otherwise some time could be missed. This would be especially important from a standpoint of calculating capacity.

Wayne

[FL2006]

Thank you for answering!
Let me give you a simple example of a product flow:
Times for 1 product
Step1: Preparing components for product: 20 sec operator 15 sec machine
Step2: Manual insertion of step 1 components into a printed circuit board: 45 sec operator 0 sec machine
Step3: Soldering: 30 sec operator* 50 sec machine
Step4: Testing product: 20 sec operator 28 sec machine

*preparing the machine for soldering. This machine preparing is done once when a new product is running! So we should divide 30 to number of products that were soldered?

Cycle time is clear, standard time for this product?

[gszekely]

Are you looking for something like this :
"Maynard Operation Sequence Technique (MOST)

Primary Sort
The Maynard Operations Sequence Technique (MOST) is a flexible measurement system that establishes normative times for the component tasks of manual work. MOST is widely regarded as a very effective technique for assessing non-uniform work flows. "
We use it, not bad, not perfect.
BR
György

[FL2006]

Standard time of product=sum of all operational time (the time needed for one operator to complete one product,al stations,in seconds).This is how I see standard time! Am I wrong?
TKS