TSþþ extends TSþ with the addition

TSþþ extends TSþ with the addition that the cocoa farmers,
when packing the cocoa beans, already mark all bags with unique
codes and date. In this case the finished chocolate is traceable up to
the individual cocoa farmer. Alternatively, the local buying station
could mark the bags at arrival, with the information of the farmer
delivering the beans.
In Fig. 3 the different traceability systems can be seen.
3.3.3. Different product recalls
The simulation model is able to simulate two possible food
crises and corresponding recalls (R1 and R2) that could occur in the
case study supply chain. R1 simulates the product recall in case of
a contamination of the cocoa beans, which could be a chemical
contamination while farming, fermenting or drying. In this case all
chocolate bars produced with cocoa beans from a certain cocoa
farmer need to be recalled. R2 simulates the product recall in case
of a contamination of a processing batch, which could be caused by
a problem in a roasting process. In this case all chocolate bars
produced in a certain roasting process need to be recalled. The
simulation models allow to run single and multiple simulations.
Due to the importance of the roasting process it is also possible to
run single or multiple simulations automatically for different processing
batch sizes. For this paper, we simulated the food scares for
a range of processing batch sizes between 1,600 kg and 5,000 kg
(every multiple of 200 kg). Each of the sizes is then run multiple
times, while information such as number of runs, processing batch
size, recall size and number of processing batches (which reflects
the production efficiency) is registered, and average results can be
determined.