Using figure 4.17 that documents an existing two handed process, build / construct a new two hand process chart incorporating the suggested changes shown mid page on following textbook page. Calculate the new summary for the operation. Note that the calculated values of effective and ineffective time for each hand split out some time for a described action that involves the therblig P (Position) and record this as ineffective time. For the left hand P has been assigned 0.4 seconds reducing the time for getting the bolt, placing the bolt and disposing of it from the summed value of 3.3 to 2.9. In your reporting ignore this adjusting and use the listed action times as they stand in reporting the values requested. Assume the clamp hold and release actions are foot actions and on release the clamp falls down the drop chute. a. What is the new cycle time in seconds? b. What is the new effective time of the left hand in seconds?

Part: SK-112 Two-hand process chart Operation: Assemble cable clamps Operator name and no.: J.B. #1157 Analyst: G. Thuering Method (circle choice) Present Proposed Sketch: Page 1 of 1 Summary Left hand Right hand Effective time: 2.7 11.6 Ineffective time: 11.6 2.7 Cycle time = 14.30 sec. Date: 6-11-98 U holt Nuts -Clamp Note: Gravity feed chutes for assembly parts Assembled units Man Left hand description Sym-Time bol Time Sym- bol RE Get U-bolt (10") 1.00 TII 1.00 RE G G Place U-bolt (10") M P 1.20 1.20 Right hand description Get cable clamp (10") Place cable clamp (10") Get first nut (9") 1.20 M Place first nut (9") M P RL 1.00 RE G 3.40 U Run down first nut RL Hold U-bolt H 11.00 1.00 RE G Get second nut (9") 1.20 M Place second nut (9") 3.40 U Run down second nut RL Dispose of assembly M RL 1.10 0.90 UD Wait Part: SK-112 Two-hand process chart Operation: Assemble cable clamps Operator name and no.: J.B. #1157 Analyst: G. Thuering Method (circle choice) Present Proposed Sketch: Page 1 of 1 Summary Left hand Right hand Effective time: 2.7 11.6 Ineffective time: 11.6 2.7 Cycle time = 14.30 sec. Date: 6-11-98 U holt Nuts -Clamp Note: Gravity feed chutes for assembly parts Assembled units Man Left hand description Sym-Time bol Time Sym- bol RE Get U-bolt (10") 1.00 TII 1.00 RE G G Place U-bolt (10") M P 1.20 1.20 Right hand description Get cable clamp (10") Place cable clamp (10") Get first nut (9") 1.20 M Place first nut (9") M P RL 1.00 RE G 3.40 U Run down first nut RL Hold U-bolt H 11.00 1.00 RE G Get second nut (9") 1.20 M Place second nut (9") 3.40 U Run down second nut RL Dispose of assembly M RL 1.10 0.90 UD Wait