[ TEKNIK INDUSTRI - EPSK1 - 5 ] METHODS-TIME MEASUREMENT (MTM 1)

Summary

This transcript provides an in-depth lecture on time measurement methods, specifically focusing on predetermined time systems (PTS) like MTM (Methods-Time Measurement). The speaker covers the historical development of MTM, explaining key components like MTM1, its factors, and the role of various movements, such as visual control, muscle control, and mental control. The lecture also details different movement classifications, such as reaching, holding, and applying pressure, using specialized tables for time calculation. Furthermore, the discussion highlights the practical application of these methods in industrial operations and movement analysis, as well as the distinctions between motion combinations and simultaneity.

Takeaways

• 😀 MTM (Methods-Time Measurement) is a system used to determine standard times for tasks by analyzing and classifying movements.
• 😀 The history of predetermined time systems dates back to the 1920s, evolving from studies on therbligs by Gilbert and work by Frederick Winslow Taylor.
• 😀 MTM1 is a part of the MTM family and focuses on measuring time based on body movements, classified into hand, muscle, and mental control.
• 😀 The system categorizes movements based on factors such as vision, distance, and load, all affecting the time it takes for each movement.
• 😀 To determine time using MTM1, specific tables like the Rich Table are used to classify movements and estimate the time based on distance and movement type.
• 😀 There are five classes of movements in MTM1, ranging from simple reaching movements to complex ones requiring special tools or balancing.
• 😀 Additional tables, such as the ‘mu’ and ‘apply pressure’ tables, account for factors like load or pressure during movements, adjusting the time estimate accordingly.
• 😀 The MTM1 system helps in understanding the impact of carrying loads on movement times, incorporating specific constants for different load sizes.
• 😀 Notation in MTM1 involves identifying the movement, distance traveled, and class of movement (e.g., reaching 12 inches is classified as a certain category).
• 😀 MTM also distinguishes between combination and simultaneous motions, where combination involves one body part performing multiple actions, while simultaneous motions involve multiple body parts acting together.
• 😀 The concept of simultaneous movements is analyzed using specific tools to assess whether two movements can be performed together easily or require more practice.

Q & A

What is the main focus of this lesson?

The lesson focuses on time measurement methods, specifically on Factor and Method Time Measurement (MTM), with a particular emphasis on MTM1. It aims to teach students how to determine standard time using indirect measurement methods.

What is the history of the predetermined time system discussed in the lesson?

The history of the predetermined time system traces back to the study of therbligs by Gilbert in the 1920s, and later developments by Frederick Winslow Taylor. MTM1 emerged as a key evolution, followed by MTM2 and MTM3. In the 2000s, advancements were made through computer systems such as Pemos for Windows.

What are the key factors influencing movement duration in MTM1?

In MTM1, four key factors that influence the duration of a movement are visual control, distance precision, load, and the coordination of muscle and mental control.

How does MTM1 differ from the Factor method in determining time?

Unlike the Factor method, which involves checking individual body part movements, MTM1 directly uses tables that list time values for specific types of movements, considering their characteristics such as distance and movement class.

What are the five classes of movement in the Rich table of MTM1?

The five movement classes in the Rich table are: Class A (basic motion), Class B (target movement), Class C (uncertain or variable motion), Class D (delicate or small object handling), and Class E (complex movements involving balancing or preparatory actions).

How are movement times calculated using the Rich table in MTM1?

To calculate movement time using the Rich table, first, identify the movement type (e.g., reaching or lifting), then classify it into one of the five movement classes. After that, determine the distance or specific characteristics (e.g., load or precision) and use the corresponding time value from the table.

What is the role of the Load table in MTM1, and how is it used?

The Load table in MTM1 adjusts the time values based on the weight of an object being handled. The time from the basic movement (e.g., lifting) is modified by adding a constant value that corresponds to the load weight.

What is the 'Turn and Apply Pressure' movement in MTM1?

'Turn and Apply Pressure' refers to two basic movements: turning, which involves rotating an object, and applying pressure, which involves pushing or pressing an object. The time for these movements is calculated based on their classification (e.g., Class A or B) and any additional load involved.

How does MTM1 account for simultaneous or combined movements?

MTM1 differentiates between simultaneous and combined movements. Simultaneous movements involve different body parts working together, while combined movements involve the same body part performing multiple actions at once. MTM1 has tools and tables to assess the feasibility of such movements and their associated time values.

What is the difference between time units in the Factor method and MTM?

In the Factor method, time is expressed in terms of 10^-4 minutes, whereas in MTM, time is measured in MTM time units (TMU), where 1 TMU equals 10^-5 hours. This shows that MTM uses a more precise unit for time measurement.