Dehydration will cause your skin to be dry and flaky and itches , just like what we call winter skin, and can also cause your sips to be very dry, chapped and red from the dryness, but the way you describe your symptoms, you have something systemic going on,, like an allergy.
Operating Standards are a set of guidelines or regulations that people have to meet or exceed while in operation. It makes sure that the product that they produce is of acceptable quality for consumption by the public.
If you read through the definition, you can clearly identify the key tenets: leadership, continuous improvement, focus on customer, and optimizing current processes. Simply put, operational excellence is executing in an efficient and effective manner across the value chain with a focus on delivering value to customers.