  This article presents a new high-level parallel computational model named BSF
- Bulk Synchronous Farm. The BSF model extends the BSP model to deal with the
compute-intensive iterative numerical methods executed on distributed-memory
multiprocessor systems. The BSF model is based on the master-worker paradigm
and the SPMD programming model. The BSF model makes it possible to predict the
upper scalability bound of a BSF-program with great accuracy. The BSF model
also provides equations for estimating the speedup and parallel efficiency of a
BSF-program.
