Model Matematika Perencanaan dan Pengadaan Obat di Instalasi Farmasi Rumah Sakit dengan Menggunakan Aljabar Max Plus

In pharmaceutical installations, drugs need to be managed in order to facilitate and speed up services where the management is a series of activities including planning, procuring, storing, and distributing. Planning in the management of pharmaceutical installations is the main thing that needs to be considered, this is because planning is a determinant of success for subsequent activities. In addition, to avoid drug shortages, more careful planning must be carried out. The purpose of this research is to make Petri Net and Max Plus Algebra models which are useful for managing scheduling planning and procurement of oral drugs in Hospital Pharmacy Installations. The data used in this study is secondary data from the results of records in the Pharmacy Installation of the Dental and Oral Hospital, Bhakti Wiyata Health Sciences Institute in 2021. The results obtained from Petri Net are the Max Plus Algebra model which shows the maximum time for ordering oral drugs. so that drug vacancies in a hospital can be avoided. Conclusions and suggestions from the results of this study obtained a mathematical model that aims to provide convenience in planning and procurement of drugs in hospital installations so that they are on time and do not experience delays in drug procurement.