Additionally, when calculating cost-efficiency, the false-negative lesions at colonoscopy should also be considered.
To calculate the global cost efficiency of the subsystem (t = l,,(l = 1, ldots,T)), of multi-period network system (the global cost efficiency of DMU o in time period (l) or period global cost efficiency), we first revise model (6) as follows: begin{aligned} &C_{o}^{l} = hbox{min} quad sumlimits_{i = 1}^{m} {bar{x}_{i}^{l} } hfill {text{s}}.
After solving model (9) for each time period (t = l,,(l = 1, ldots,T)), we calculate the global cost efficiency of multi-period network system, this time by using the obtained optimal solutions to model (9) as follows: CE_{o}^{prime } = frac{{sum_{l = 1}^{T} {C_{o}^{l} } }}{{sum_{t = 1}^{T} {sum_{i = 1}^{m} {bar{x}_{io}^{t} } } }}.
By the optimal solutions to model (15) for (alpha = 1, ldots,q,) we can calculate the multi-period global cost efficiency of network system and its processes at the same time.
We consider the processes of the system as the independent units and measure the multi-period global cost efficiencies of them, then we calculate the multi-period global cost efficiency of network system using a weighted average of the obtained global cost efficiencies of the processes.
The cost efficiency was calculated as: begin{aligned} text{Platform~cost~efficiency} = & &frac{text{Computational~performance}}{text{Platform~cost}}, end{aligned}} (12).
However, the cost measures estimated in these studies were not assigned monetary values; instead, cost efficiency was calculated as the percent improvement in headache disability index divided by an estimate of average therapist time spent with each patient.
Among them, Scenario 2 achieves the lowest social cost, and the cost efficiency of Scenarios 3 4 is calculated compared with Scenario 2. Scenario 3 obtains the best cost efficiency (0.2513 ton/€), which means the reduction of one more ton emission cost only €3.98.
An incremental cost efficiency ratio (ICER) will be calculated.
Using national discharge registries and cost data from hospitals, cost efficiency in the production of somatic hospital care was calculated for public hospitals.
