Why is there no single scientific method?

Question

Why is there no single scientific method?

Answer 1

There is no single scientific method. Some of the methods of science involve logic, e.g., drawing inferences or deductions from hypotheses, or thinking out the logical implications of causal relationships in terms of necessary or sufficient conditions. Some of the methods are empirical, such as making observations, designing controlled experiments, or designing instruments to use in collecting data.

Answer 2

Because the usual text book version of the scientific method isn't efficient enough; not every experiment can be properly carried out using it and changes in the exact method are often made for actual experiments.