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. 2015 Aug 28;10(8):e0135466. doi: 10.1371/journal.pone.0135466

Fig 2. Explanation of cost analysis.

Fig 2

The mathematical model estimates sampling performance (number of needle passes, number of procedures) based on a combination of controlled inputs (decision variables) and uncontrolled inputs (technical inputs). The operational model estimates operational performance (sampling time, setup time) based on the sampling performance and operational inputs. Finally, the cost model estimates the overall cost based on the operational performance and cost inputs.