A typical dentist’s office has a complicated mix of dental procedures and significant setup times; thus, it is similar to a job shop. Suppose a dentist works a 9-hour day with one hour for lunch and breaks. During the first six months the practice is open, he does all the work, including cleaning and setting up for the next dental procedure. Setup and processing times for three procedures are shown in the Microsoft Excel Online file below. Also shown are the number of appointments and demand for each type. On a particular day, there are two scheduled first appointments for single tooth crowns (see last column of the table in the Microsoft Excel Online file below), one second appointment for a single tooth crown, three tooth-whitening appointments, four first appointments for a partial denture, one second appointments for a partial denture, and three third appointments for a partial denture. Assume there is one setup time per dental procedure to set up and clean the equipment and room before the next patient arrives. Is there sufficient capacity to perform all the work? Dental Procedure Appointments Setup or Changeover Time (Minutes) Processing Time (Minutes) Demand (No. of Patients Scheduled) Single tooth crown 1st appt. 20 95 2 Single tooth crown 2nd appt. 10 20 1 Tooth whitening 10 25 3 Partial denture 1st appt. 25 20 4 Partial denture 2nd appt. 15 40 1 Partial denture 3rd appt. 10 25 3 Questions 1. What is the total setup time? 3. What is the total time? 4. What percentage of the total capacity is used to set up and change over from one dental procedure to the next? Round your answer to two decimal places. 5. What percentage of the total capacity is spent on dental procedures. Round your answer to two decimal places.
A typical dentist’s office has a complicated mix of dental procedures and significant setup times; thus, it is similar to a job shop. Suppose a dentist works a 9-hour day with one hour for lunch and breaks. During the first six months the practice is open, he does all the work, including cleaning and setting up for the next dental procedure. Setup and processing times for three procedures are shown in the Microsoft Excel Online file below. Also shown are the number of appointments and demand for each type.
On a particular day, there are two scheduled first appointments for single tooth crowns (see last column of the table in the Microsoft Excel Online file below), one second appointment for a single tooth crown, three tooth-whitening appointments, four first appointments for a partial denture, one second appointments for a partial denture, and three third appointments for a partial denture. Assume there is one setup time per dental procedure to set up and clean the equipment and room before the next patient arrives. Is there sufficient capacity to perform all the work?
| Dental Procedure | Appointments Setup or Changeover Time (Minutes) | Processing Time (Minutes) | Demand (No. of Patients Scheduled) | |||
| Single tooth crown 1st appt. | 20 | 95 | 2 | |||
| Single tooth crown 2nd appt. | 10 | 20 | 1 | |||
| Tooth whitening | 10 | 25 | 3 | |||
| Partial denture 1st appt. | 25 | 20 | 4 | |||
| Partial denture 2nd appt. | 15 | 40 | 1 | |||
| Partial denture 3rd appt. | 10 | 25 | 3 |
Questions
1. What is the total setup time?
3. What is the total time?
4. What percentage of the total capacity is used to set up and change over from one dental procedure to the next? Round your answer to two decimal places.
5. What percentage of the total capacity is spent on dental procedures. Round your answer to two decimal places.
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