The estimation technique we shall discuss is known as the Linear Least Square
Method (LLSM). It is so commonly applied in engineering and mathematics problem that is
often not thought of as an estimation problem. The linear least square method (LLSM) is a
special case for the least square method with a formula which consists of some linear
functions and it is easy to use. And in the more special case that the formula is line, the
linear least square method is much easier. The Weibull distribution function is a non-linear
function, which is