A guide to writing an allergen control plan, including necessary topics that a plan should address such as: supplier monitoring, plant traffic flow, raw material storage, color-coding systems for utensils used with allergens, production scheduling, cleaning, use of rework, evaluation of program effectiveness, label review policies, frequency of plan review, documentation and documentation review of activities, and employee education. Please note that this post predates 21 CFR 117 and updated resources should also be consulted.