Maynard Operation Sequence Technique (MOST) Datacard

The MOST Datacard dialog box provides options for the MOST work measurement techniques.

There are also two types in the MOST family, which the industry uses, Mini MOST and Maxi MOST.

The codes and datacard are very much similar to the existing MOST system (BasicMOST).

  • Basic MOST: for performing operations that are likely for more than 150 times but less than 1500 times per week.
  • Maxi MOST: analyze performing operations that are likely for less than 150 times per week.
  • Mini MOST: analyze repeating operations likely more than 1500 times per week.

The only change is in the calculation of time value differs among these subsystems.

Get Put Return
A B G A B P A
3 16 1 3 3 1 3
SUM Method Time Measurement (TMU) SEC
Basic MOST 30 300 10.8 /* the Sum of individual value is multiplied by 10
Mini MOST 30 30 1.08 /* the Sum of individual value is multiplied by 1
Maxi MOST 30 3000 108 /* the Sum of individual value is multiplied by 100

Analysis of extensive work measurement data indicates certain sequences of motions repeat consistently. The most common activity sequence represents the spatial movement of objects. For Basic MOST, we use 4 sequence models, General Move, Controlled Move, Tool Use and Manual Crane.

To access the dialog box, select the MOST subsystem in the Time Analysis Dialog Box and click Datacard.

You have the option to display it with brackets by clicking Preferences, Manufacturing Planning, Time-Motion Study, MOST tab. Then Displaying codes in MOST Norms Format: (A1B1G1) A1B1P1A1 3, or "-," A1-3 B1-3 G1-3 A1-1 B1-1 P1-1 A1-1.

Select the Sequence Model required, and the data is imported into the Sequence, Basic Time, and Analyzed Time windows.

This page discusses:

Description

Description
Describes the Datacard MOST.

Sequences Section

Contains the following options:

General Move

This covers the movement of none or more objects from one location to another freely through the air. This activity represents the following sequence of subactivities or parameters:

ABGABPA

in which:

  • A = Action Distance (mainly horizontal)
  • B = Body Motion (mainly vertical)
  • G = Gain Control
  • P = Placement

Meanwhile the variation for each subactivity based on workplace conditions and the method used indicates by an index value.

For example:

A6, B6, G1, A1, B0, P3, A0,

in which:

  • A6 = Walk three or four steps.
  • B6 = Bend and rise.
  • G1 = Grasp an object.
  • A1 = Move within reach.
  • B0 = No body motion.
  • P3 = Place object with adjustment.
  • A0 = No return move.

In addition, the subactivities within each activity sequence are "slotted" into fixed time ranges represented by an index value corresponding to the median of each range. The time intervals for each of these index values calculate using standard statistical principles based on predetermined accuracy requirements.

The common scale of index numbers for all MOST sequence models is 0, 1, 3, 6, 16, 24, 32, and 42. The time value for a sequence model in Basic MOST is obtained by adding the index numbers for each individual subactivity (or parameter). Then multiply the sum by 10. Example: the standard time in TMUs (time measurement units) for the sequence in the above example is:

6+6+1+1+0+3+0=17x10=170.

Since one TMU equals 1/100,000 of an hour, 170 TMUs are equal to approximately 6 seconds.

Note: However, the sequence model with index values provides more than the total time value (normal time) for the activities. It also describes the method used. In Computer MOST, all index values automatically assign to a sequence model by entering workplace data and a method description based on "keywords." Allowances automatically add to yield the allowed or standard time.

Controlled Move

This sequence model is applicable when the object retains contact with another object during the move (example, a lever, crank, or pushbutton). The Controlled Move sequence model is similar to the General Move:

ABGMXIA

with three different parameters:

  • M = Move Controlled
  • X = Process Time
  • I = Alignment

Tool Use
This covers more than conventional hand tools like wrenches, screwdrivers, gauges, and writing tools. It also covers fingers and mental processes. However, the Tool Use sequence model does not define a third basic activity --normally it is a combination of General Move and Controlled Move activities. This also includes a Tool Use sequence with frequency.

Occasionally an activity may involve the fastening or loosening of several fasteners in succession using the same tool. Sometimes there is a special convention in the Tool Use category of the MOST datacard, where A (Action distance) inserts between the P (Placement) and F (Fasten) tools. Or other valid Tool Action parameters such as Loosen, Cut, Surface treatment, Measure, and Think and Record. This allows for the Action Distance between fasteners. Analyze the entire activity using one Tool Use Sequence Model.

If you assign a nonzero value to the index of A subactivity, then A subactivity is added to the sequence

For example:

In the following case, the index of 7th subactivity (A) is 0. So the Sequence shown is A1B0G0A0B0P0F0A0B0P0A0 i.e no A between P and F.

In the following case, the index of 7th subactivity (A) is 1. So the Sequence shown is A1B0G0A0B0P0A1F0A0B0P0A0.

New code sequence adds to the TA lines through editing the Code in the Time Analysis sheet.

Manual Crane
This covers the sequence models for a Manual crane.
Process Time
Select a process time code and provide an index for it through the editor. Then click store to insert it into the TA lines.

Parameters Section

The options in the Parameters are as follows:
Parameters
Clicking Index Extension, the window appears to display the data.
Partial and Global Frequency
Clicking to define the frequency required.
SIMO To
Enter any string or numbers representing another TA line that is in simultaneous motion with the current line. This (Simultaneous Motion) SIMO To value has no impact on the time. It provides information on the Simultaneous motion of the current Time Analysis line.
VA and NVA (Value Added or Non-Value Added) Category

Previously, in a MOST object when adding a new row, a VA option enables. This defaults to the first that is in the Preferences. So, if you forget to change this, you could end up getting bad data.

To avoid this:

  • Add a NONE at the first index of VA control. Selecting NONE, and you try to insert code by clicking Store sequence into the analysis line or clicking OK, you are prompted with YES/NO. Value added category is not selected. Do you want to continue inserting?. Selecting YES, the code inserts into lines and the VA column on that line are specify as empty. Selecting NO, the code does not insert into line allowing you to select a value from the selection.
  • Value adds categories in the selection lists in ascending order. And you can enter to filter the required value add category.

If they are activated in Customizing Preferences, Valued Added then a list window appears for NVA and clicking the VA Category opens a window to display the customization.

OK and Cancel
Clicking OK the sequence is stored and the dialog box closes. Clicking Cancel, close the dialog box without storing the sequence.

Functionality

Command Icons:

Use these icons to:

  • Store sequence into analysis line
    Note: You can also click OK to store sequences.
  • Restore sequence from analysis line
  • Clear Datacard
  • Clear the analysis line
  • Copy code from one line to another
  • Move the cursor one line downward
  • Move the cursor one line upward