My question is about order of approximation in field as well as integral. My understanding is that the order of field is the order of the polynomial shape functions in element and order of integral is for the integration in qp. For a 3 point triangular element as well as 4 point quadrilateral element, I think order of field should be 1 and using any other value is "wrong". Is this correct ? Also, I noticed from user manual that the order of integral = 2* order of field. I was curious what is the basis for this assumption ?