1- Complete the time study by filling in the circles. Then, calculate a standard time. Assume a 10% allowance on job time. Standard time 2- What is motion study? 3- What is a therblig? 4- Identify some of the ineffective therbligs. 5- How may the basic motion 'search' be eliminated from the work cycle? 6- What three variables affect the time for the basic motion 'move'? 7- Explain the difference between avoidable and unavoidable delays. 8- A secretary reached for the envelope with her right hand, picked it up and exchanged it to her left hand. She then reached for the letter opener with her right hand, picked it up, positioned the blade under the sealed lid of the envelope, and proceeded to slit the top of the envelope open. Still holding the envelope in her left hand, she laid the letter opener aside, and reached into the envelope with her right hand, pulled out the document, and began to read. Write a list of the therbligs that comprise this motion sequence and label each basic motion with a brief description. Sketch a SIMO chart for these activities. 9- Sitting at her desk, a writer reached for a mechanical pencil, picked it up, positioned it, and then began to write on a pad of paper. After finishing one sentence, she lifted the pencil, and read the sentence. She then put the pencil aside and reached for the rectangular eraser nearby. Grasping and positioning it, she erased one of the words in the sentence. Write a list of the therbligs that comprise this motion sequence and label each basic motion with a brief description. For the previous problem, identify some areas for possible study that might improve the method, indicating the nature of the improvement that might result. 10- What is the snapback timing method when using a stopwatch during direct time study? 11- What is the continuous timing method when using a stopwatch during direct time study? 12- Why is performance rating a necessary step in direct time study? 13- Why is an allowance added to the normal time to compute the standard time? 14- What are some of the causes of variability in the observed work element times that occur from cycle to cycle? 15- Why is the student t distribution rather than the normal distribution used in the calculation of the number of work cycles to be timed? 16- What is the difference between elemental performance rating and overall performance rating? 17- Why is the time of day recorded on the time study form? 18- Explain what a foreign element is and how foreign elements are handled under the continuous method. 19- The time study analyst at Dorben Company developed the following snapback stopwatch readings where elemental