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.
An operational definition is a definition in which something is defined by that which comprises it. For example, a pie-eating competition is operationally defined as a competition in which one eats pies.(measured in the amount of pies eaten).perational definitions are also used to define system states in terms of a specific, publicly accessible process of preparation or validation testing, which is repeatable at will. For example, 100 degrees Celsius may be crudely defined by describing the process of heating water until it is observed to boil.