noun
solution; way out; resolution method
A concrete method or plan for solving a problem. Often used in practical contexts such as business, technology, or personal issues.
この問題の解決法を考えましょう。
Let's think of a solution to this problem.
彼はいつも良い解決法を
He always finds a good solution.
対策 is a countermeasure or plan to deal with a problem, often implying a proactive or preventive approach, whereas 解決法 focuses on the solution to an existing problem.
Compound of 解決 (resolution) + 法 (method). The word is a straightforward Sino-Japanese formation.