Recent developments in funding healthcare have created a need to know
the cost of each input into a patient episode of care. In most cases p
athology departments will be faced with a complex costing problem in t
heir efforts to meet this need, owing to the diversity of investigatio
ns performed and the variation in cost between the least and the most
expensive investigations. Most methods for costing pathology services
are resource intensive, from the point of view both of the initial set
up and of maintenance of the data. They often require a level of fina
ncial detail that may not be available. The model described in this pa
per will accept crude financial data and can be refined as better data
become available. In our hands the model has yielded useful informati
on and has raised the awareness of staff to the cost of the work they
perform. Although the model has been applied to an analysis of patholo
gy costs, the principles are transferable to other areas which have a
wide range of ''products'' for which individual costs may be difficult
to identify.