A research question is "a question that a research project sets out to answer". Choosing a research question is an essential element of both quantitative and qualitative research. Investigation will require data collection and analysis, and the methodology for this will vary widely. Good research questions seek to improve knowledge on an important topic, and are usually narrow and specific.

To form a research question, one must determine what type of study will be conducted such as a qualitative, quantitative, or mixed study. Additional factors, such as project funding, may not only affect the research question itself but also when and how it is formed during the research process. Literature suggests several variations on criteria selection for constructing a research question, such as the FINER or PICOT methods.

The answer to a research question will help address a research problem or question. Specifying a research question, "the central issue to be resolved by a formal dissertation, thesis, or research project," is typically one of the first steps an investigator takes when undertaking research. Considerations, such as project funding or methodological approaches may influence the research process, including when and how the research question is developed. Clearly and accurately defining the research question can become an iterative process. ^{[citation needed]} How the question is constructed can depend on the type of research or discipline.

Specifying the research question is one of the first methodological steps the investigator has to take when undertaking research. Having an interest in or knowledge of a particular subject can be useful in the construction of a research question. Formation of the research question is largely determined by, and likewise influences, where and what kind of information will be sought. The research question must be accurately and clearly defined. Choosing a research question is the central element of both quantitative and qualitative research and in some cases it may precede construction of the conceptual framework of study; in all cases, it makes the theoretical assumptions in the framework more explicit and indicates what the researcher wants to know most and first. ^{[citation needed]} Therefore, the investigator must first identify the type of study (qualitative, quantitative, or mixed) before the research question is developed. Forming the research question may become an iterative process when parameters of the research process, such as field of study or methodology, do not fit the original question. Literature suggests several methods for selecting criteria in the development of a research question, two of which are the FINER and PICO methods.

The FINER method can be a useful tool for outlining research criteria used in the construction of a research question. Due to the flexibility of the criteria, this method may be used for a variety of research scenarios. The FINER method prompts researchers to determine whether one has the means and interest to conduct the study. It also asks one to consider the ethical ramifications, as well as the relevancy of the research.

According to Farrugia et al., the FINER criteria "highlight useful points that may increase the chances of developing a successful research project". These criteria were first suggested in the book Designing Clinical Research by Hulley et al., detailed below.

F – Feasible

I – Interesting