Configure
Products carry rules: dependencies, incompatibilities, minimum quantities, regional availability. In many businesses those rules live in the heads of a few experienced salespeople, which works until somebody new quotes a combination that cannot be built. Encoding them prevents impossible quotes, and the cost avoided is not the correction but the credibility lost when a customer is told after agreeing that their configuration does not exist.
Price
Different customers legitimately buy at different rates by tier, region, volume or negotiated exception. Holding the applicable price list against the customer record means a quote picks up the right rate without anyone remembering the slab. This is where the largest silent errors occur, because a wrong price is not obviously wrong until an invoice is disputed.
Quote
The document, the approvals, the versions and the acceptance. The specific discipline that matters is generating the document from the same data the quote lives in, rather than retyping into a template, and storing each revision rather than overwriting it so that the accepted version is unambiguous months later.
A worked example (illustrative figures)
A customer wants 40 seats plus two add-on modules. Configuration rules confirm the second module requires the first, and that the tier has a 25-seat minimum, both satisfied. The customer is on a regional price list at ₹1,000 per seat per month, so the base is ₹40,000 a month. A volume break at 25 seats applies 10%, bringing it to ₹36,000. The salesperson wants to offer a further 15%, which exceeds their 10% authority, so the quote routes for approval before the document can be generated. Once approved, the document is produced from the same record, the version is stored, and acceptance is logged against the opportunity. Nothing in that sequence relied on anyone remembering a rule.