Disadvantages of method:

Some disadvantages of this method

• First-order derivatives are required; it is not convenient for a designer to provide first-order derivatives.
• There is not local control support.
• The order of the curve is constant regardless of the number of data points.
• Physically, the values of parameters a₀, a₁, a₂ and a₃ do not have any intentive meaning. If you know these values, you may not guess the shape of the curve.