The phrase "an extensive model" is correct and usable in written English.
It can be used when referring to a model that is comprehensive or covers a wide range of aspects in a particular field or subject.
Example: "The researchers developed an extensive model to analyze the impact of climate change on biodiversity."
Alternatives: "a comprehensive model" or "a detailed model".
EBay (www.ebay.com) has an extensive model railroading section with subsections for different scales (N, HO, etc).
The accuracy of SOCRATES was also reflected in an extensive model comparison [26].
Second, we consider an extensive model where the fraction of immediate payment is decided by the retailer.
In this paper, we provide an extensive model of SC-FDMA transmission with frequency domain equalization (FDE).
Based upon source distribution models assuming three different cosmological evolutionary scenarios (no evolution, weak evolution, and strong evolution), an extensive model for diffuse emission from infrared cirrus, and instrumental noise estimates, we present a comprehensive analysis for the determination of the confusion levels for deep far-infrared observations.
For example, the production researcher managed to find, on request, a vicar who had an extensive model railway in his rectory, another whose ministry was based on water (the Chaplain of the Broads) and a vicar whose congregation at the time numbered zero.
The party has built an extensive modeling and targeting operation, where an individual score is assigned to every voter in a Congressional district, giving strategists the ability to find supporters (particularly those first-time voters who backed Obama) and make sure they cast ballots.
So in 2010, UNICEF undertook an extensive modeling exercise to test the cost-effectiveness of an equity-focused strategy to reduce under-five mortality.
Last year, soon after I arrived at UNICEF, we put a team of our best analysts to work on an extensive modelling exercise to test the cost-effectiveness of an equity-focused strategy to reduce under-five mortality.
The parameterization of procedures allows for a fine, but not too an extensive modeling of possible cases, together with their impact on operating room occupancy, and upon various staff requirements.
In this paper, we aim to understand the underlying mechanisms for the observed oscillations via comparing our results with an extensive simulation model.
