Blog

Discrete stocking levels are used when an organization does not want visibility of inventory levels.

An inventory buffer adds value and lowers cost in all supply chains.

The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to 5 percent of the cost of the beer. If he were to order 50 cases of Stein beer at a time, what would be the average inventory level?

Suppose we’re running a study to see if Americans’ blood pressure has risen in the last couple of decades.  In adults in 2003, the best estimate for the population’s average systolic blood pressure was 128 mmHg. In our study with n = 57 n = 57 patients, we found a sample mean systolic blood pressure of 137 mmHg. The null hypothesis for our study should be μ = ? \mu = ? .  Enter your answer only as a number (don’t type the “mmHg” part).

Suppose we want to test whether the average time per mile in a running class is less than 10 minutes. What would the alternative hypothesis (not the null hypothesis) be in this situation?

Distributed Database Systems Since a transaction may access data items at several sites, transaction managers at several sites may need to coordinate to implement ______.

Parallel Databases It is possible to speed up the processing of a query by parallelizing the execution of each individual operation, such as sort, select, project, and join. What is this form of parallelism called?

Parallel Databases It is possible to run operations A and B simultaneously on different processors so that B consumes tuples in parallel with A producing them. What is this form of parallelism called?

Parallel Databases Because main memory is so much slower than processors, a significant amount of potential processing speed may be lost while a core waits for data from main memory. These waits are referred to as _________.

Parallel Database Systems In __________, the size of the database increases, and the tasks are large jobs whose runtime depends on the size of the database.