The current pasteurised milk supply chain in Thailand was explored. The analysis of the business process of the
raw milk collector in central Thailand, using IDEF0 at levels 0 and 1, was presented to illustrate current activities
which are planning, sourcing, making, delivering and returning. Then, the problems were identified and guidelines
for improvement were proposed, such as using a spreadsheet and mathematical model for the long-term planning
process; establishing the measurement of the temperature and nutrient composition of raw milk from each farm so
that the traceability is applicable; decisional support for blending optimisation; optimal impeller design; and truck
tracking. In summary, we hope our guideline can be implemented at milk collection centres to increase the upstream
supply chain efficiency. In the future, the logistics costs and cost structures of each of the stakeholders should be
identified so that cost reduction measures can be implemented (Ongkunaruk and Piyakarn, 2011; Ongkunaruk and
Usri, 2012).