Growers took red and yellow carrots to create the orange root, just like using a paint box. Before then, carrots were purple, red, white, green, yellow, or black. Carrots are readily available in five main colors in the stores these days: orange, red, purple, white, and yellow. Each color has a different health benefit.
A pilot study, pilot project or pilot experiment is a small scale preliminary study conducted in order to evaluate feasibility, time, cost, adverse events, and effect size (statistical variability) in an attempt to predict an appropriate sample size and improve upon the study design prior to performance of a full-scale research project.
Typically, a pilot program begins with a proposal that lists the objectives of the pilot program and documents how the program will be carried out. The documentation should also provide a time-line for the pilot and metrics for how success will be determined. See also: project charter, project scope, gap analysis.