Scientific code users usually demand fast, accurate and cheap solver. However, this is difficult to fulfill as the requirement is closely related to the methods, algorithm and the environment in which the codes run. Such demands will be more difficult when the problem to be solved become more complex and expensive. With the introduction of parallel computing environments with increasing power, the works on solving of various expensive and difficult phenomena are becoming more widely open and new challenges are appearing. By the invention of such powerful environments it is hoped to solve the numerical problem faster than in the sequential computing environment, to solve insolvable problem with size and time constraints and/or accuracy constraints which were not able be solved in the sequential environment. In this paper, we will discuss the implementation of parallel iterated metode base on variabel stepsize implicit multistep Runge-Kutta of Radau type by using SPMD approach on MPI-Linux parallel system of HPCCSUI Depok Laboratory for stiff problems. Alhadi Bustamam* Heru Suhartanto**, T. Basaruddin**; * Jurusan Matematika FMIPA-UI** Fakultas Ilmu Komputer UI
