Formalise the process
In order to prepare the input data, the process to be descrived and assessed, also interviewing the opertator in charge of it. The main information to be determined and defined are:
  1. 1.
    the main basic operations, the main steps of the work at issue;
  2. 2.
    the typology of each operation identified;
  3. 3.
    the information required by each of the operations in order to get the right time value, in terms of accuracy, difficulty and distance covered.
The MTM-UAS methodology considers different classes of activities reported in the table below, together with a description:
Get and Place
grasp and put an object, taking into account its distance and shape
put an object in a more or less precise way
Handle Aid
tools handling using for example pliers or screwdrivers
the actuation or press of a botton or a lever
Motion Cycles
tasks with movements carried out continuously and repeatedly
Body Motions
the movements are done to move
Visual Inspection
action of the head and eyes to control an element
These clsses of activities must be further detailed according to the 7 tables shown in the figure below.
According to the different classes of activities, further specifications are needed.
With respect to 'Get and place', the first column refers to the WEIGHT, expressed in daN. Then the DIFFICULTY is considered only for the low weight case. For the 'Get and place', 'Place' and 'Handle aid' classes also the ACCURACY dimension must be declared. or the 'Operate', 'Motion cycles' and 'Body motions' classes the specific TYPOLOGY of activity executed must be specified. For the classes of activities involving walking, 3 different ranges of distance can be selected.
Grounding on these specifications, a value for the Time Measurement Unit (1 TMU = 36 milliseconds) is provided,
After this initial assessment it is possible to move to the preparation of the input data.
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