will be reduced by lambda square- all area dimensions will be reduced by lambda square and all volume dimensions including weight will be reduce by lambda cubed.
What is the tolerance we can give in model manufacture? It is almost impossible to manufacture a model to exact dimensions of the model, as we get by dividing by lambda, so one has to be careful to see that tolerances are within limit; normally, on breadth we give about a millimeter tolerance and on length we give an allowance of 2 millimeters- within that tolerance you should be able to manufacture model, making sure the tolerance does not mean generation of roughness on the model surface or introduction of additional curvatures than what the main ship should have.