unfavourablefavourable

• keep surfaces that are to be machined small

             unfavourablefavourable

• raise surfaces to be machined

             unfavourablefavourable

• only specify requirements that are absolutely necessary

             unfavourablefavourable

• Avoid edge angles < 90°

             unfavourablefavourable

• bevel surfaces to be
  finished
  

             unfavourablefavourable

• dimension bevelling so that facets do not need to be finished