The phrase "apportioned using a" is correct and usable in written English.
It can be used when discussing the distribution or allocation of something, typically in a formal or technical context.
Example: "The resources were apportioned using a fair and transparent method to ensure equity among all participants."
Alternatives: "distributed by means of a" or "allocated through a".
First, costs were estimated and apportioned using an activity-based approach reflecting actual resource use (UNAIDS 2000, 2011); second, overhead service centre costs were allocated to supporting, intermediate and direct service centres.
Costs were apportioned using the apportionment criteria described in Table 1, in some cases via an intermediate cost centre.
The drivers of land use change were identified and apportioned using stochastic models based on unbiased recursive partitioning method embracing the conditional inference tree (CIT) and random forest (RF) with a focus on cropland and urban land.
The PM10 mass, elemental composition and the water soluble inorganic ions were quantified and seven sources were identified and apportioned using the positive matrix factorization: sea spray, aged sea salt, mineral dust, mixed combustions, road traffic, secondary sulfate and secondary nitrate.
Variation in resting and net metabolic rate was apportioned using general linear modelling (GLM) between duck identity (fixed factor), body mass and load mass (covariates).
Instead, these costs were apportioned using inpatient equivalents calculated as patient days for the clinics involving the assumption that patient days are equivalent to attendances divided by the average length of stay (3.47 days in the special clinic).
So, the costs of staff-time, their transportation costs and allowances including the apportioned use of capital items like motor bikes were amounted US$3.133.
For entries without a specified campus, we apportioned the remaining undetermined entries using a new apportionment method this year.
The water sources of the subsurface flows were apportioned to individual rain events using a two end-member model (i.e., mobile pre-event soil water extracted by a suction-cup sampler vs. rainwater (event water)) based on δ18O measurements.
The $700 million pot was created after New York officials complained that the city, a past target for terrorists, was being shortchanged because Washington had been apportioning security aid to cities by using a formula that did not take into account vulnerabilities.
