Method searches are placed by professionals. Somebody typing a technique by name has a budget and a brief, and pages written in that vocabulary are found by people ready to commission rather than to learn.
Decision searches arrive much earlier. A founder wondering whether anybody wants their product has no idea what to buy, and content that explains which approach answers which question turns that visitor into a client months later.
Feasibility work is quietly reliable. Studies required for funding applications, planning cases or grant conditions arrive with a defined scope and an existing budget, and very few agencies write for them.
Sector language is the qualifier. Retail, healthcare and industrial buyers use different words for the same technique, and a proposal from an agency fluent in theirs is read differently from one that is not.