Thin coverage on a single trade (only one sub quoted electrical, for example) leaves an estimator exposed to a late price change, a no-show at bid time, or an uncompetitive number with no way to check it. Strong coverage, typically multiple quotes per major scope, lets an estimator pick the best combination of price and risk and still have a fallback if a sub drops out after award.
Coverage gets harder on public work with tight bid windows. Subs and suppliers are often quoting the same deadline for several general contractors at once and cannot always turn a quote around for every GC who asks. Figuring out what needs a sub-quote, then tracking who has and has not responded, is one of the more repetitive parts of putting a bid together. Nonlinear reads the spec sections and drawings for scopes that need a sub-quote and gives the estimator a coverage checklist to work from.
