Final answer:
The first step in developing a plan is to develop a research question, which is part of the scientific method's initial phase of inquiry and background investigation.
Step-by-step explanation:
The first step in developing a plan, specifically in a scientific or research context, is to develop a research question about the topic. This initial step is part of the broader scientific method, which begins with asking a question, followed by conducting background research on existing sources, and then formulating a hypothesis. In the context of engineering or design processes, the first step might alternatively be to define the problem or identify a need, which employs similar foundational goals of understanding the challenge before planning further.
Regardless of the specific domain, whether it be scientific research or engineering design, the first step generally involves understanding the situation, identifying the issues or concepts involved, and determining a clear direction for the subsequent research or design steps. Accurate and effective planning at this initial phase lays the groundwork for a successful and informed strategy throughout the project.