Question

In: Operations Management

Problem 17.3: the ideal cycle time of an assembly machine is 5 sec. the parts feeder...

Problem 17.3: the ideal cycle time of an assembly machine is 5 sec. the parts feeder at one of the workstations has a feed rate of 75 components/min and the probability that the components will pass through the selector is 18%.   The active length of the feed track (where the high-level sensor is located) is 350 mm. the low-level sensor on the feed track is located 100 mm from the station work head. The components have a length of 12.5 mm in the feed track direction, and there is no overlapping of parts.

(a) How long will it take for the supply of parts to be depleted from the high-level sensor to the low-level sensor once the feeder-selector device is turned off?

(b) How long will it take for the parts to be resupplied from the low-level sensor to the high-level sensor, on average, after the feeder-selector device is turned on and turned off?

Solutions

Expert Solution

****Please please please LIKE THIS ANSWER, so that I can get a small benefit, Please****

a)Write the relation to calculate the time to deplete from higher level to lower level sensor once the feeder selector is turned off.

…… (1)

Here, is the depletion time, is the cycle rate, is the number of components in feed track at higher level sensor, and is the number of components in feed track at lower level sensor.

Calculate the number of components in feed track at lower level sensor.

Calculate the number of components in feed track at higher level sensor.

Calculate the cycle rate.

Here, is the cycle time.

Substitute for .

Substitute for , for , and for in the equation (1).

Hence, the time to deplete from higher level to lower level sensor once the feeder selector is turned off is .

b)Write the relation to calculate the time to resupply from lower level to higher level sensor once the feeder selector is turned on.

Hence, is the time to resupply, is the frequency, and is the probability that the components will pass through the selector.

Substitute for , for , and for .

Hence, the time to resupply from lower level to higher level sensor once the feeder selector is turned on is .

****Please please please LIKE THIS ANSWER, so that I can get a small benefit, Please****


Related Solutions

(A) The feeder-selector device at one of the workstations of an assembly machine has a feed...
(A) The feeder-selector device at one of the workstations of an assembly machine has a feed rate of 45 components/min and provides a throughput of one part in five. The ideal cycle time of the assembly machine is 6 sec. The low-level sensor on the feed track is set at 10 components, and the high-level sensor is set at 25 components. (a) How long will it take for the supply of components to be depleted from the high-level sensor to...
Problem 2. Problem 1. An ideal Rankine Cycle with reheat uses water as the working fluid...
Problem 2. Problem 1. An ideal Rankine Cycle with reheat uses water as the working fluid with a flow rate of 0.15 kg/s. At the inlet of the turbine (state 1) the water is a superheated vapor at 475ºC and 11 MPa. The pressure at the exit of the first stage of the turbine is 0.9 MPa. The reheat temperature (state 3) is also  475ºC.   The condenser pressure is 8 kPa, and the water exits as a saturated liquid Find: (a)...
At time t = 11.5 sec, a particle of mass M = 5 kg is at...
At time t = 11.5 sec, a particle of mass M = 5 kg is at the position (x,y,z) = (4,4,6) m and has velocity (2,1,-2) m/s. 1) What is the x component of the particle's angular momentum about the origin? Answer: -70 kg m2 2) What is the y component of the particle's angular momentum about the origin? Answer:100 kg m2 3) What is the z component of the particle's angular momentum about the origin? Answer: -20 kg m2...
C&A uses an assembly line of 20 stations to make a product. The cycle time is...
C&A uses an assembly line of 20 stations to make a product. The cycle time is 5 minutes per unit. Step 6 is the most error-prone operation. Inspection occurs at the last station. What will be the information turnaround time for a defect made at station 6 if there is no inventory between stations? 0.2 minute 5 minutes 70 minutes 100 minutes
Air within a piston-cylinder assembly execute an ideal Carnot power cycle within maximum and minimum temperatures...
Air within a piston-cylinder assembly execute an ideal Carnot power cycle within maximum and minimum temperatures of 600 K and 300 k, respectively. The heat added at the high temperature is 250 kJ/kg. The lowest pressure in the cycle is 75 kPa. Assuming the ideal gas model for the air (constant cv, cp, k, with the following properties: kair = 1.4, cv,air = 0.717 J/g.K, Mair = 28.97 g/mol, Universal Gas Constant 8.314 /( . ) _ R = J...
A worker-machine operation was found to involve 4.6 minutes of machine time per cycle in the...
A worker-machine operation was found to involve 4.6 minutes of machine time per cycle in the course of 40 cycles of stopwatch study. The worker’s time averaged 3.1 minutes per cycle, and the worker was given a rating of 121 percent (machine rating is 100 percent). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance percentage of 13 percent of work time which is applied only to the worker element (not the machine element), determine...
Transaction Time frame Cost Parts sold to washing machine producer Fall 2018 $500 in parts Factor...
Transaction Time frame Cost Parts sold to washing machine producer Fall 2018 $500 in parts Factor labor leads to washing machine Winter 2018 $425 in labor Home Depot buys washing machine Spring 2019 $1,000 for the car Home Depot sells washing machine to customer Summer 2019 $1,250 for the car Using the information in the table above, describe two different ways the transactions could contribute to GDP for both years. Which way is used in practice? Be sure to provide...
An ice-making machine operates on the ideal-vapor compression cycle using refrigerant-134a. The refrigerant enters the compressor...
An ice-making machine operates on the ideal-vapor compression cycle using refrigerant-134a. The refrigerant enters the compressor as saturated vapor at 40 psia and leaves the condenser as saturated liquid at 80 psia. Water enters the ice machine at 55°F and leaves as ice at 25°F. For an ice production rate of 21 lbm/h, determine the power input to the ice machine (169 Btu of heat needs to be removed from each lbm of water at 55°F to turn it into...
Rankine cycle experiment: 5000ml water consumed in experiment used Time (sec): 1055 Boiler, Temp (c): 167.199...
Rankine cycle experiment: 5000ml water consumed in experiment used Time (sec): 1055 Boiler, Temp (c): 167.199 Turbine In, Temp (c):109.3 Turbine ex, Temp (c): 97.79 Boiler Pres, (KPa) : 721.315 Turbine In Pres, (KPa): 85.639 Turbine Ex Pres, (KPa): 32.826 Fuel flow, (L/Min):5.842 Generator, (RPM): 1949.185 Voltage (volts): 7.443 Current (Amps): 0.135 Power (Watts): 1.002 Calculate: 1.Mass flow rate of water/ steam in the closed cycle. 2. Specific work generated by the turbine. 3. Power generated by the turbine. 4....
Problem 1. Consider a crystal with HCP structure, having an ideal c/a ratio. Complete parts (a)-(c)...
Problem 1. Consider a crystal with HCP structure, having an ideal c/a ratio. Complete parts (a)-(c) below. (a) (1.0 pt max) Demonstrate that the ideal c/a ratio equals 2 6/3. (b)(0.5 pt max) Find the volume of one unit cell for a given a value. (c) (0.5 pt max) Demonstrate that the atomic packing factor for this crystal structure is  2/6. Hints: (a) The c/a ratio is considered ideal when the distance from some atom to its nearest neighbors...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT