STOPWATCH TIME STUDY

CHAPTER I DATA COLLECTION AND PROCESSING 1.1 Stopwatch Time Study Stopwatch time study is a work measurement that was popular and widespread in 1970s. Many company from automotive, textile, and other manufacturing in ...

CHAPTER I DATA COLLECTION AND PROCESSING 1.1 Stopwatch Time Study Stopwatch time study is a work measurement that was popular and widespread in 1970s. Many company from automotive, textile, and other manufacturing industries used this method on every production job in a company by developing standard times based on this study. Stopwatch time study is a type of direct time measurement that applied to highly repetitive and short-in-time jobs (Wignjosoebroto, 2000). In this study, time required to perform an operation and environmental condition are recorded. The principle objectives of stopwatch time study are to increase productivity, product reliability, and lower unit cost. Thus, allowing more quality goods or services to be produced for more people. Output of this practicum is the measurement of standard time to complete an activity that used as a standard time of work for all workers. Stopwatch time study widely applied in the repeatedly daily activities that take a short time, such as bolts-nuts installation on a vehicle, assembling puzzle, and so on. The advantages of stopwatch time study are the measurement done directly, the equipment to do this method are quite simple, and the steps to finish stopwatch time study in order to define work time standard are easier. The disadvantages using stopwatch time study in work measurement are need more than one operator to do analyzing work element in stopwatch time study (one person as time keeper, one person as operator), potentially human error occurred when calculate the time (Rao, 2008). 1.2 Existing Method This subchapter consists of the existing method from stopwatch time study practicum. 1.2.1 Departmentalization and Work Flow of Existing Method Here are the existing methods of departmentalization that shows operations and activities in each department. II-1Table 1.1 Department 1 Departmentalization Department 1: Book Patterns Formation Operation 1: Draw the book patterns on the flannel Working element 1: Drawing the book patterns fit in with the size on the first flannel Allowance Material Handling Table 1.2 Department 2 Departmentalization Department 2: Accessories Patterns Formation Operation 2: Draw the first accessories patterns on the flannel Working element 1: Drawing the first accessories patterns fit in with the size on the second flannel Operation 3: Draw the second accessories patterns fit in with the size on the third flannel Allowance Material Handling Table 1.3 Department 3 Departmentalization Department 3: Book Patterns Cutting Waiting Operation 4: Cutting the book patterns on the flannel Working element 1: Cutting the first flannel fit in with the patterns Allowance Material Handling Table 1.4 Department 4 Departmentalization Department 4: Accessories Patterns Cutting Waiting Operation 5: Cutting the first accessories patterns on the flannel Working element 1: Cutting the second flannel fit in with the patterns Operation 6: Cutting the second accessories patterns on the flannel Working element 2: Cutting the third flannel fit in with the patterns Table 1.4 Department 4 Departmentalization (con’t) Department 4: Accessories Patterns Cutting Operation 7: Cutting satin ribbon Working element 3: Measuring the satin ribbon fit in with the determined size Working element 4: Cutting the satin ribbon fit in with the size Allowance Material Handling Table 1.5 Department 5 Departmentalization Department 5: Assembly II-2Waiting Operation 8: Assembling the pieces of book patterns Working element 1: Assembling all pieces of book patterns Operator 9: Assembling satin ribbon Working element 2: Putting satin ribbon on the assembled side Operator 10: Assembling the book with the accessories Working element 3: Assembling the first book accessories on the assembled side Working element 4: Assembling the second book accessories in front of cover Allowance Material Handling Table 1.6 Department 6 Departmentalization Department 6: Finishing Waiting Operator 11: Assembling key chain ring Working element 1: Estranging key chain ring Working element 2: Putting key chain ring on the satin ribbon hole Operation 12: Writing "BOOK" on the cover Working element 3: Writing the word "BOOK" on the book cover (second book accessories) Allowance Material Handling Here is work process of key chain and phone chain department based on departmentalization before. Figure 1.1 Work Process of Key Chain Department 1.2.2 Existing Data Recapitulation Here are data recapitulations of each department’s operation time. Table 1.7 Department 1 Operation Time Recapitulation Department 1: Book Patterns Formation Working Time of nth Product X 1 3 4 5 6 II-3Operation 1 : Draw the book pattern on purple flannel Work element 1 : Drawing the book patterns that fit in with the size on purple flannel 47 37 25.9 35 29.4 27.6 Operation 2 : Draw the book pattern on orange flannel Work element 2 : Drawing the book patterns that fit in with the size on orange flannel 26 41 22.2 29 24.1 25.9 Allowance 2 1.3 2.05 0 0 0 Material Handling 7 6.6 6.6 6.7 6.9 6.9 Table 1.7 Department 1 Operation Time Recapitulation (con’t) Department 1: Book Patterns Formation Working Time of nth Product Average 7 9 10 11 12 Operation 1 : Draw the book pattern on purple flannel Work element 1 : Drawing the book patterns that fit in with the size on purple flannel 30 26 21.9 33 29 29.45 Operation 2 : Draw the book pattern on orange flannel Work element 2 : Drawing the book patterns that fit in with the size on orange flannel 24 28 33.7 38 27.1 29.38 Table 1.7 Department 1 Operation Time Recapitulation (con’t) Department 1: Book Patterns Formation Working Time of nth Product Average 7 9 10 11 12 Allowance 0.5 0.3 0 0 0 0.41 Material Handling 6.8 6.8 5.7 6.7 7 6.67 Table 1.8 Department 2 Operation Time Recapitulation Department 2: Accessories Patterns Formation Working Time of nth Product X 1 3 4 5 6 Operation 3 : Draw the side accessories pattern on green flannel Work element 1 : Drawing the patterns that fit in with the size on green flannel 23 17 28.5 26 29.4 34.5 Table 1.8 Department 2 Operation Time Recapitulation (con’t) Department 2: Accessories Patterns Formation Working Time of nth Product X 1 3 4 5 6 Operation 4 : Draw the front accessories pattern on green flannel