Though simple to understand, its use demands knowledge of its elements, its constraints, and the implications at work.Though simple to understand, its use demands knowledge of its elements, its constraints, and the implications at work.Though simple to understand, its use demands knowledge of its elements, its constraints, and the implications at work.Though simple to understand, its use demands knowledge of its elements, its constraints, and the implications at work.Though simple to understand, its use demands knowledge of its elements, its constraints, and the implications at work.Though simple to understand, its use demands knowledge of its elements, its constraints, and the implications at work.