alternative means; alternative method
A formal or technical term for a substitute way of doing something, often used in problem-solving or planning contexts.
To solve this problem, we must consider alternative means.
Secure an alternative method in case transportation stops.
Compound of 代替 (だいたい, 'substitution') and 手段 (しゅだん, 'means'). The word follows standard Sino-Japanese compounding patterns.