King AbdulAziz University



-5010151097280Work Study's (Right/Left Hand Activity Chart)00Work Study's (Right/Left Hand Activity Chart)ID:Name:1232908Sarah AlMasoudi1333123Hanan Talal Ibrahim1333297Batool Omar Bajkhaif1333259Hannan Al-Qarni1334978Heba Gogandy-47625125095Date of Submission: 25-Sept-2015Instructor: Eng.Shorouq KhassawnehSection: DAG00Date of Submission: 25-Sept-2015Instructor: Eng.Shorouq KhassawnehSection: DAG134239031750Table of Contents00Table of ContentsPage number:Topic:2 Introduction2 The Objectives3 The Work4The experiment 4The instruments4Experiment Procedures:5Results of Student No.1 (Heba Gogandy)7Results of Student No.2 (Hannan Al-Qarni)9Results of Student No.3 (Batool Omar)Results of Student No.4 (Sarah AlMasoudi)To sum up:ConclusionIntroductionThis is the third lab report of subject (IE341) work study which will be about a very effective method to analyze the work done by workers which is Activity Charts.In general, the activity chart is a listing of the activities of one or more subjects (e.g., workers, machines) plotted against a time scale to indicate graphically how much time is spent on each activity. the aim of using activity chart is to provide a brief descriptions of the activities against a vertical scale for a single worker perfuming a repetitive work cycle. There are many types of activity charts but in this report the focus will be on the right hand/ left hand activity chart. Right-hand/left-hand activity chart?is an illustration that shows the contributions of the right and left hands of a?worker?and the balance of the workload between the right and left hands. The aim of using Right-hand/left-hand activity chart?is to eliminate or reduce the unnecessary motion to minimum, and to organize the motion in best possible sequence to accomplish a specific task. Right/Left Hand Activity Chart activity chart is also known as two handed process chart and workplace activity chart.In this report we will describe a simple assembly process task. and record the time required to do each basic motion of the task by four students each separately, starting by the right hand then the left and finally using both hand for each student. The report will be divided into two parts (present method), Observe and record the activities of one hand at a time and (proposed method) Observe and record the activities of both hand at a time. Each student will do the two parts so three charts will be presented for each of them.ObjectivesThe objectives of this laboratory experiment are as follows:To understand and use the activity chart (Right/Left Hand Activity Chart) while performing a task:To describe a simple assembly process task in a laboratory setting that simulates a simple repetitive task, such as a basic assembly task (laboratory experiment) and create an appropriate right/left hand activity chart for the simple repetitive task.Understand how to improve the simple repetitive task's activities and create the proposed right/left hand activity chart for the improved activities. The Work:Before moving to the experiment a description about the activity chart presented in the following lines. The activities in the activity charts are indicated by vertical lines or bars When the bars are used, they are shaded or colored to indicate the kind of the activity as shown in figure1.3492534290Figure1There is many kind of activity chart such as: Worker-machine activity chart, Worker-multimachine activity chart, Gang activity chart and Right-hand/left-hand activity chart which is the topic of this report as mentioned above.Right-hand/left-hand activity chart?helps in explaining and comparing the performance of the left and right hand activities during performing a highly repetitive task. So the?activities of a worker’s hand are recorded with respect to each?other. The chart will help in presenting a detailed knowledge can be attained regarding the job which lead to establish the comparison between using the two hands. So, many charts are made and compared then the best method is found out. The chart includes four columns one column for activates done by the right hand, second column for activates done by the left hand and the other two columns for the time (min) and total task cumulative time (min).The experiment We will use Simple assembly tool test which is The Grooved Pegboard, it's consist of 25 holes with randomly positioned slots. the pegs are keyhole-shaped must be rotated to match the hole before they can be inserted.As mentioned before this experiment consist of two parts present method and proposed method. The experiment will be done by four students each separately. The different between the two parts is very simple in the present method the Pegboard should be hold and use the other hand to insert pegs. While in the proposed method the board should be on the table and use both hand to insert pegs. Interments:Grooved pegboard tool Pegs.Digital stopwatch. Experiment Procedures:Starting by present method:Hold the board with the left hand and record the time required to hold it. Record the time required to pick up the peg and then insert it into the hole in the board with the right hand.Repeat the previous step for the other 24 pegs.Repeat these three steps again but hold the board with right hand and insert the peg with the left hand. Four students must do the previous steps. For proposed method:Put the board on the table. Put the first 12 pegs near to the right hand and the other 13 pegs near to the left hand. Record the time required to pick up the 25 pegs and insert them into the holes with both hands separately.Insert the pegs and record the total time required to pick up the peg and insert them into the holes regardless to its position whether it is near the hole or not. Four students must do the previous steps.Results:*Student No.1 (Heba Gogandy)-528320107315Table 1: First part of the experiment (present method) Student No.100Table 1: First part of the experiment (present method) Student No.1Left hand (activity description)Time(Sec)Right hand(activity description)Cumulative time (Sec)Hold the pegboard1.59Open the pegboard.3.2Pick up the peg and then insert it into the hole in the board.4.792.337.122.229.342.3511.692.4714.162.9917.152.6619.811.1220.931.722.632.0924.722.0726.791.8528.642.7931.431.5232.951.7834.732.6337.362.2139.571.4641.032.1843.213.0746.282.1948.471.8150.282.3652.643.1255.762.7958.551.65Close the pegboard.60.2Minimum time1.12 secMaximum time3.2 secThe Average2.2784 sec-711201583690Table 2: Second part of the experiment (proposed method) student No.1.00Table 2: Second part of the experiment (proposed method) student No.1.Left hand (activity description)Time(Sec)Right hand(activity description)Cumulative time (Sec)1.59Open the pegboard.Pick up the left 13 pegs and then insert it into the holes near the left hand.1.86Pick up the first 12 pegs and then insert it into the holes near the right hand.3.452.365.812.998.81.9510.752.112.851.5914.442.4716.911.3518.262.2720.532.0922.621.3924.012.0326.042.1128.152.730.852.6733.522.0135.533.2238.753.3542.12.7744.872.5147.382.3449.722.352.023.4355.452.8658.312.9761.281.65Close the pegboard.62.93Minimum time1.35 secMaximum time3.43 secThe Average2.3876 secTotal Time (sec)57.11-4562475-170180Total time of both hands for student No.1:00Total time of both hands for student No.1:*Student No.2 (Hannan Al-Qarni)-9461569850Table 3: First part of the experiment (present method) Student No.200Table 3: First part of the experiment (present method) Student No.2Left hand (activity description)Time(Sec)Right hand(activity description)Cumulative time (Sec)Hold the pegboard3.33Open the pegboard.1.33Pick up the peg and then insert it into the hole in the board.4.661.335.991.847.831.769.593.5513.143.1414.771.6316.41.5717.972.6920.661.7022.361.7224.083.1327.211.1028.311.69302.10 32.11.57 33.67 1.3535.021.9937.012.9239.931.8541.781.9243.72.5946.291.5347.821.8349.652.7652.411.71Close the pegboard.54.12Minimum time1.10 secMaximum time3.55 secThe Average2.0236 sec-368935209550Table 4: Second part of the experiment (proposed method) student No.200Table 4: Second part of the experiment (proposed method) student No.2Left hand (activity description)Time(Sec)Right hand(activity description)Cumulative time (Sec)3.33Open the pegboard.Pick up the left 13 pegs and then insert it into the holes near the left hand.1.59Pick up the first 12 pegs and then insert it into the holes near the right hand.4.921.246.161.257.411.939.342.0711.413.3814.791.8516.641.1617.82.4120.212.0222.23.9523.18.9524.131.2925.422.3927.812.3930.22.9133.112.3835.493.0938.581.1739.753.1142.862.3545.212.5547.765.8153.571.8655.431.9357.361.7159.07Minimum time1.16 secMaximum time5.81secThe Average2.1612 sec-92075142875Total time of both hands for student No.2:00Total time of both hands for student No.2:Total Time (sec)1:02:58-604520244475Table 5: First part of the experiment (present method) Student No.300Table 5: First part of the experiment (present method) Student No.3*Student No.3 (Batool Omar)Left hand (activity description)Time(Sec)Right hand(activity description)Cumulative time (Sec)Hold the pegboard1.86Open the pegboard.1.86Pick up the peg and then insert it into the hole in the board.3.722.666.381.467.842.3910.231.3911.621.5713.191.9715.162.4417.62.5720.172.0522.221.8824.12.2926.391.3927.784.5532.331.8534.181.8936.071.8937.961.7039.661.1840.842.042.022.4744.021.4846.491.3847.971.1749.141.4750.611.87Close the pegboard.52.48Minimum time1.17secMaximum time4.55secThe Average2.86 sec-401320231775Table 6 Second part of the experiment (proposed method) student No.300Table 6 Second part of the experiment (proposed method) student No.3Left hand (activity description)Time(Sec)Right hand(activity description)Cumulative time (Sec)1.86Open the pegboard.Pick up the left 13 pegs and then insert it into the holes near the left hand.2.12Pick up the first 12 pegs and then insert it into the holes near the right hand.3.983.117.091.098.182.1710.351.3811.731.6715.072.1617.231.6620.492.3322.822.9925.813.0428.853.5732.421.9434.362.1036.462.6239.081.8940.974.2445.213.2548.462.2550.712.4153.121.9355.051.9256.972.6859.651.9961.642.3063.941.87Close the pegboard.65.81Minimum time1.09 secMaximum time4.24 secThe Average2.665 sec-44450205105Total time of both hands for student No.3:00Total time of both hands for student No.3:Total Time (sec)55.85*Student No.4 (Sarah AlMasoudi)To sum up:We finished this experiment and measured the difference between the left and right hands of ours; this will affect the time quality at work in the future. And we learned how we can analyze the work for a single worker perfuming a repetitive work scientifically. We noticed that most of the students (3 out of 4) managed to score less time with working with both hands than working with only one hand. And the averages of the time were between 2.0 and 2.6.Conclusion This report introduced us to a new knowledge that will help us to analyze the work for a single worker perfuming a repetitive work scientifically, and this will increase our ability to figure out the best way of doing a specific task and facilitate it for the worker to do it optimally with lowest possible effort and in short time. This report was divided into two parts, present and proposed method, each method done by four students from the team. We started by present method and we analyzed the performance of one hand at a time. Then the proposed method while the performance of the both hand analyzed at a time. the proposed method have done twice, the pegs divided to two groups, one group put near the right side of the pegboard and the other to the left. While the second part done with regardless to the position of the pegs. Finally we compared the result of the four students and sum them up. ................
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