Lab+5

Motion study Safe the health of workers how hand movement works ergonomic- process of economic scale
 * Frank Gilbreth**

Ergonomics aim to study " human capabilities in relationship to work demands. " (http://www.ergonomics.org/)  "Ergonomics is matching the job to the worker and product to the user." (www.ccohs.ca) It is the science that design workplace equipments, workplace environment that best fit the human body. Ergonomics also help prevent workplace injuries and maintain workers' health. Having proper equipments and furniture for worker can maximize their efficiency at work. Machines are also designed to be user-friendly and save spaces in the office. For example, with less buttons or more flexible interface.
 * Write three paragraphs to define the term 'ergonomics'. **

Ergonomics focuses on the relationship between work and worker. It focuses on how work affects the workers, and aim to decrease the human error made at work. While work often involved in repetitive tasks and forcing actions, Ergonomics is studied to prevent body injuries caused by these factors. Also, products develop with Ergonomics discipline also allow human to make several safe and comfortable postures while using the products.

Ergonomics also hope to develop utilities that enable the entire usage of the human body, such as large area of muscles and joints. This is because human body injuries can be decreased and prevented if the forcing motions are supported by a larger part of the body, instead of just a particular body part, such as one arm or the back.

The "Gilbreth system of motion analysis" contains methods of motion studies that make it possible to examine the smallest motions. The different kinds of motions are being categorized so that they system would become uniform. The system shows Therblig's analysis of unnecessary motions in daily tasks.
 * What is the 'Gilbreth system of motion analysis' (1 paragraph)**

Frank Therblig started looking at motion analysis and discussed about the 15-16 motion cycles during 1915-1920. Therblig develops motion study while studying at the motions used at performing a task. Individual motions are examined, aimd to eliminate any motions that are not needed, also to decrease the chance of injuring the body while acting particular motions.
 * Who was Frank Therblig, and how did he utilize 'motion study'? (2 paragraphs)**


 * Describe three categories Frank Gerblith used in the Therblig Analysis Checklist.**

One of the categories used in the Therblig Analysis Checklist is "Use". In this category, seven questions are being asked to help users discover if there are any tools that can be used to elimate human's motions and thus decrease human injuries. For example: questions such as "Can a jig or fixture be used?" or "Does the activity justify mechanized or automated equipment"? are being asked in this category.

Another category in the Therblig Analysis Checklist is "Position". In this category, the human body position is being concerned while performing tasks or activities. Questions such as "Can tolerances be changed?" or "Can the hole be counterbored or countersunk?" are being examined.

"Rest to Overcome Fatigue" is also one of the categories being analysied in Therblig Analysis Checklist. In this category, motions perform by different body parts are studied to see if they can take turns in using them. This can prevent a certain body part to be used continuously and get injured because of fatigue. Quesitons such as "Can the operator alternately sit and stand while performing work?" or "Are mechanical means being used for heavy loads?" are being examined.

Sources: www2.ie.psu.edu/Freivalds/courses/ie327classic/**Therblig**.pdf gilbrethnetwork.tripod.com/**therbligs**.html