The aim of our paper is to increase production efficiency of a small and medium sized enterprise by
applying cost-effective process development tools. The existence of the firms depends on their business processes,
because optimally-organised process is a key in the run of business (business run) in a productive way. In order to
keep and grow the competitive edge with the competitions, firms must supervise their processes with constant
frequency, and if it is needed, procedures must be developed. In this case, company can resort to both human and
physical resources. Our experiment focused on the development of an assembly process at a small sized enterprise.
Applying process modelling techniques, and diagnostic procedures, and also data gathering methods we try to get to
define corrective actions, with which the whole lead time can be reduced by 50%. For investigate and rank waste we
use failure mode and effects analysis and 5 whys methods.