eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2008 20 3 651 658 jusps-A 1426 article S. Sachithanantham (sachin7676@yhaoo.com) 1 V. Ganesan 2 R. Sathiyamoorthi 3 Department of statics, St. Joseph College of Arts and Science, Cuddalore - 6007 001 Tamil Nadu (INDIA) Department of Statics, Periyar EVR College, Trichi - 620 023, Tamil Nadu (INDIA) Former Head, Department of Statics, Annamalai University, Annamalainmagar- 608002 (INDIA) <p style="text-align: justify;">Base Stock system for patient customers in inventory control is a special type of problem which introduces the fact that the shortages do not result in the loss of profit due to the fact that immediately a demand for the product is reported; an order is placed for supply. This is in addition to the inventory on hand called the ground level inventory. Hence the socalled base stock denoted as B is equal to the total of the inventory on ground and the inventory on orders placed. In this paper the optimal value of B is obtained using the fact that the lead time is a random variable and it satisfies the so called Setting the Clock Back to Zero (SCBZ) property which amounts to the change in the parameter of the lead time distribution after a change point.<br /> &nbsp;</p> https://www.ultrascientist.org/paper/1426/ Base stock Patient Customers SCBZ property Change point lead time.