18 Questions
What is the unit of time used in motion study to measure movements?
Winks
Who concluded that any work can be done by using a combination of some or all of 17 basic motions known as Therbligs?
Frank B. Gilbreth
What is the term 'Therblig' spelled backward?
Gilbreths
Which term is preferred when discussing micromotion study with factory and office personnel, instead of 'Therblig'?
Hand Motion
What did Frank B. Gilbreth develop in his early work in motion study to refer to the 17 elementary subdivisions of a cycle of motions?
'Therbligs'
Which concept is used to redesign tasks to be more effective and less time-consuming by combining 17 basic motions?
Motion Efficiency
Which term refers to the basic elemental motions involved in performing a task, as mentioned in the text?
Micro Motions
Who introduced the concept of Therbligs, according to the text?
Frank and Lillian Gilbreth
What is a key focus of the Principles of Motion Economy, as discussed in the text?
Reducing fatigue and unnecessary movements
Which term is associated with the study of eliminating wasted motions in work processes?
Therbligs
What did the Gilbreths contribute to the field of motion study, based on the text?
Pioneering time and motion studies
In terms of task efficiency, what is a primary goal of studying fundamental motions mentioned in the text?
Minimizing unnecessary movements and fatigue
What is a SIMO chart used for?
Recording micro-motion studies
In the context of motion study, what is the purpose of analyzing body motions?
To eliminate ineffective movements and facilitate effective movements
What did the Gilbreths pioneer in the study of manual motions?
Basic laws of motion economy
Which term is used to describe highly repetitive manual operations in detailed motion studies?
Micro-motion studies
What type of chart is a SIMO chart in relation to the man type flow process chart?
A micro-motion form
When is the use of a SIMO chart justified according to the text?
When the resulting savings will be very high
Study Notes
Motion Study and Motion Economy
- Motion study redesigns tasks to make them more effective and less time-consuming by applying the principles of motion economy.
- Movements are recorded in motion studies against time measured in "winks" (1 wink = 1/2000 minute).
Therbligs
- Frank B. Gilbreth developed 17 basic motions, called Therbligs, that are common to all kinds of manual work.
- Therbligs are elementary subdivisions of a cycle of motions.
- The term "therblig" is a coined word, spelled backwards from Gilbreth.
Fundamental Hand Motions
- Most work is done with the two hands, and manual work consists of a few fundamental motions repeated over and over.
- There are 17 fundamental motions, including:
- 3 additional fundamental motions of the finger-, hand-, and arm-system
- 2 fundamental motions of the eyes
- 15 fundamental motions for body movements
SIMO Chart
- A SIMO chart is a recording technique for micro-motion study, used to record simultaneously on a common time scale the Therbligs or a group of Therbligs performed by different parts of the body.
- SIMO chart is useful for analyzing highly repetitive manual operations.
- It requires an elaborate procedure and expensive equipment, and is justified when the savings resulting from the study will be high.
Gilbreths and Motion Study
- The Gilbreths pioneered the study of manual motions and developed basic laws of motion economy still relevant today.
- They developed detailed motion picture studies, termed as Micro Motion Studies, for analyzing highly repetitive manual operations.
Test your knowledge on motion study and the principles of motion economy. Learn about basic terms like Winks and Therbligs, and understand how tasks can be redesigned to be more effective and less time consuming.
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