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Mathematics in Ergonomics


In ergonomics there are several mathematical techniques are used and when we are taking about mathematical techniques following points can be discussed.

Numerical factors
Numerical factors are widely used in industrial engineering purposes of textile industry. For an example I can get operation and tag time among operator skills and it can be denoted by histogram.
Here tag time denoted by dark horizontal line and here in collar attaching 3rd operator take extra time and aiding this displayed chart management can identify production dropping hotspot.
Next example is merchandising on time tracking time tracking and it is known as OTT. We all know bulk merchandisers launch purchase orders of fabric and garment accessories to start particular production. But sometimes purchased orders are not delivery into correct time. This is difficult to manage directly hence supply chain department produce OTT reports each weekly and bit example is given below chart.   



  
Via this chart management can see each merchandiser efficiency and attitudes among their works. This example is much enough to say ergonomic is multipurpose subject which can be apply each area of garment industry.
Symbolic notations dealing with quantities
Symbolic notations dealing with quantities are used in fabric inspection and statistical quality control purposes. In fabric inspection each fabric roles damages and weak points are recorded in to 0 to 4 points and sometimes in modern industry use colour symbolic codes just like green, yellow, red and black colours are most popular in quality inspection process of each manufacturing level of garment industry. In my first training of XYZ I found this type of symbolic notation in sewing operator quality process and it has been given below picture.

Magnitudes
Magnitudes are used commonly in stores of textile industry to predicate each magnitude levels of raw materials and even maintain department also gathering magnitudes data about each machines and machinery parts. In this topic considered how many, which capacity, which levels, etc.  Sometimes to distribute magnitudes pie charts, histograms, plot charts, and other graphical methods are used.  
Formulas
Commonly efficiency calculations are done using formulas. The best example is stand allocated hours (SAH) calculations of sewing room can be taken and here efficiency calculated due to required standard hours per day by planning department. By calculating actual production by aiding operator performance with standard minute value of whole garment can be compared current productivity whether this efficiency can meet required key performance indicator (KPI) of organization.