The required number of kanbans equals:

a) 1.

b) Demand during lead time / $Q$

c) Size of container.

d) Demand during lead time.

e) Demand during lead time $+$ Safety stock/Size of container

What are three ways in which Lean and quality are related?

Kanban is the Japanese word for:

a) car.

b) pull.

c) card.

d) continuous improvement.

e) level schedule.

Given the following information about a product at Michael Gibson's firm, what is the appropriate setup time?

Annual demand $=39,000$ units

Daily demand $=150$ units

Daily production $=1,000$ units

Desired lot size $=150$ units

Holding cost per unit per year $=\$ 10$

Setup labor cost per hour $=\$ 40$

Hartley Electronics, Inc., in Nashville, produces short runs of custom airwave scanners for the defense industry. The owner, Janet Hartley, has asked you to reduce inventory by introducing a kanban system. After several hours of analysis, you develop the following data for scanner connectors used in one work cell. How many kanbans do you need for this connector?

How do your answers to Problems 8 and 9 provide insight into a collaborative purchasing strategy?

Ranga Ramasesh is the operations manager for a firm that is trying to decide which one of four countries it should research for possible outsourcing providers. The first step is to select a country based on cultural risk factors, which are critical to eventual business success with the provider. Ranga has reviewed outsourcing provider directories and found that the four countries in the table that follows have an ample number of providers from which they can choose. To aid in the country selection step, he has enlisted the aid of a cultural expert, John Wang, who has provided ratings of the various criteria in the table. The resulting ratings are on a 1 to 10 scale, where 1 is a low risk and 10 is a high risk.

John has also determined six criteria weightings: Trust, with a weight of 0.4; Quality, with 0.2; Religious, with 0.1; Individualism, with 0.1; Time, with 0.1; and Uncertainty, with 0.1. Using the factor-rating method, which country should Ranga select?

Chuck Sox makes wooden boxes in which to ship motorcycles. Chuck and his three employees invest a total of 40 hours per day making the 120 boxes.

What will be their unit increase in productivity per hour?

What is the formula for optimal setup time?

a) $\sqrt{2 D Q /[H(1-d / p)]}$

b) $\sqrt{Q^2 H(1-d / p) /(2 D)}$

c) $Q H(1-d / p) /(2 D)$

d) $Q^2 H(1-d / p) /(2 D)$

e) $H(1-d / p)$

Tej Dhakar's company wants to establish kanbans to feed a newly established work cell. The following data have been provided. How many kanbans are needed?

Carol Cagle has a repetitive manufacturing plant producing trailer hitches in Arlington, Texas. The plant has an average inventory turnover of only 12 times per year. She has therefore determined that she will reduce her component lot sizes. She has developed the following data for one component, the safety chain clip:

Annual demand $=31,200$ units

Daily demand $=120$ units

Daily production (in 8 hours) $=960$ units

Desired lot size ( 1 hour of production $)=120$ units

Holding cost per unit per year $=$ $\$12$

Setup labor cost per hour $=\$ 20$

How many minutes of setup time should she have her plant manager aim for regarding this component?

Hartley Electronics, Inc., in Nashville, produces short runs of custom airwave scanners for the defense industry. The owner, Janet Hartley, has asked you to reduce inventory by introducing a kanban system. After several hours of analysis, you develop the following data for scanner connectors used in one work cell. How many kanbans do you need for this connector?

The following table details the tasks required for Indiana-based Frank Pianki Industries to manufacture a fully portable industrial vacuum cleaner. The times in the table are in minutes. Demand forecasts indicate a need to operate with a cycle time of 10 minutes.

Draw the appropriate precedence diagram for this production line.

Concerns of suppliers when moving to Supplier Partnerships include:

a) small lots sometimes seeming economically prohibitive.

b) realistic quality demands.

c) changes without adequate lead time.

d) erratic schedules.

e) all of the above.