The Centris methodology for estimating market share is best described as bottom-up with top-down constraints. Market share varies from market to market. For local communication competition the focus is on market share wire center by wire center. Consequently, Centris models of demand and market share are constructed with local factors playing a major role. The focus is on local markets since the demand for services is a function of households and their demographics as well as the number and composition of competitors in individual markets.

The battleground for the household is structured by availability of services and availability is best viewed locally, with granularity ultimately at the street-by-street level. Market share is derived from an analysis of current and future demand. Typical metrics include Share of Product, Revenue Share, Share of Wallet, and Share of RGUs or connections.