The data‐farm template is a software component for the pipelined processor farm (PPF) software architecture. The PPF data‐farm template is a flexible, semi‐manual method of prototyping continuous‐flow applications. The template design originates in a set of abstract design principles. The PPF template is instrumented to provide either support for logic debugging at an intermediate development level on a network of workstations (NOW) or performance tuning on a target multicomputer. General implementational problems arise. The paper demonstrates the feasibility of implementing the design on a Unix‐based NOW. Sufficient detail is included to guide other implementations and to make comparison between thread packages. Descriptions of two target system implementations follow. Copyright © 1999 John Wiley & Sons, Ltd.