1. Start with the Phelan service area, not a population-based forecast
Phelan is recorded as a CDP in San Bernardino County. The population estimate provides a geographic frame for a firm serving the area, but it cannot establish legal demand, competition, search volume, lead volume or revenue. Attribution therefore should not begin with a claim about how many inquiries Phelan ought to produce. It should begin with the places, services and response paths your firm actually wants to evaluate. Ask whether an inquiry relates to Phelan, another part of San Bernardino County or a broader California service area. Keep those geographic distinctions in the records you use for review.
Recommended approach
Define the geographic labels your firm will use before reviewing performance. Treat Phelan as one service area within the recorded San Bernardino County relationship, and decide how matters outside that area will be separated. Use attribution to examine actual journeys and outcomes rather than turning population data into a forecast.
