One of the most important reasons why experiments are planned is due to health and safety issues. Individuals who know their roles can prevent any hazards arising due to lack of understanding. This enables individuals to feel more confident of their safety and fewer accidents are likely to occur during the experiment.
Clearly setting out the steps that need to be achieved makes individuals more assured and confident when conducting experiments. A list of tasks to instruct individuals also makes any experiment more understandable. Encouraging students to think about the adequateness and appropriateness of each individual step also improves the accuracy and efficiency of result collecting.
Pre-experiment planning also enables students to think about all equipment that will be required for the experiment. This can then be obtained or purchased so the experiment can be conducted with a greater range of resources. This increases the accuracy, efficiency and ease that the experiment can be carried out with.
Planning an experiment enables individuals to focus on the desired result. The rest of the steps within the experiment can then be planned accordingly. Aims and targets provide goals for individuals to achieve which can increase the desire to produce accurate results or to see an experiment through to its conclusion.