How is the man-hour cost in chemical production calculated?
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I would like to ask the experts here: I have been working in chemical production management for several years. In the past, the calculation of production man-hours was done by the branch factories, who would then provide us with the figures. Recently, I checked, but there are no standardized institutional documents regarding this. Are equipment man-hours and production man-hours the same thing? How can production volume be calculated more scientifically? The management here isn’t very standardized, and there are many things I don’t quite understand. I’d appreciate some advice from the experts here! It would be great if someone knowledgeable could give some advice; it would be even better to have any relevant institutional documents to refer to :)
In simple terms, machine hours refer to one hour of operation by a piece of equipment. As for the assessment, the company should have relevant regulations; equipment man-hours refer to the working time that the equipment can provide.
Regarding the issue of man-hours, in our previous production process, one man-hour was calculated per hour for equipment with a capacity of 17 m3; for equipment with a capacity of 57 m3, it was 1 man-hour per unit; for those with a capacity of 36 m3, it was also 1 man-hour per unit; and for the four units with a capacity of 165 m3, 45 man-hours were counted per hour
We also have statistics on the man-hours of key equipment here; do they mean the same thing?
We also have statistics on the man-hours of key equipment here; do they mean the same thing? Production involves more than one processing step, and each step has several identical machines; is that a cumulative value? Can production man-hours be equated to key equipment man-hours? I just don’t know how to calculate it systematically
What is the unit for Da Xia 17m3? I just can’t figure it out
The last edit to this post was made by li*nji on 2015-7-3 at 13:53. Regarding the working hours of key equipment such as compressors (equipment classification table), the calculation instructions for the statistical reports should be provided, including both cumulative and separate calculations
Equipment man-hours and production man-hours are not exactly the same thing; there is no unified standard for this, as it varies from manufacturer to manufacturer, and different types of equipment also differ in this regard. Take hydrogen and nitrogen compressors, for example – for the same one hour of operation, the man-hours will be different. For stationary equipment, the difference between towers with a capacity of 500 and those with a capacity of 1200 is significant. To conduct proper statistics, it is necessary to evaluate them based on factors such as process requirements and production efficiency. The ultimate goal is to facilitate management: on one hand, this involves assessing the efficiency of processes and operations, while on the other hand it involves evaluating the efficiency of the equipment and the maintenance staff. All of this is done to help reduce energy consumption, improve production efficiency, and to enable timely identification and resolution of problems. In conclusion, the purpose of managing machine hours is to provide intuitive, digital metrics that allow for quick understanding and response to production conditions or issues. From this perspective, the setting and management of machine hours should be clear, concise, and logical
We calculate man-hours based on the impact tons of the product; I’m not sure how you do it in your case
The original poster asked a very basic yet important question. In my understanding, the machine time refers to the total of each unit operation required to produce one batch of products (that is, what you call the equipment machine time). In the case of continuous production, the machine time for each unit operation is calculated separately before being summed up. As you know, to produce a batch of products in the production department, many unit reactions and intermediate processing steps are involved, and it takes time for one process to connect with the next. So I generally recommend calculating effective machine hours and ineffective machine hours separately ； The so-called wasted man-hours refer to the time lost in waiting, transitions, etc., during the production process; however, such waste is sometimes necessary.