5.2 A milk package is usually, formed by making a sleeve tube of a carton sheet, sealing it along the tube (the longitudinal sealing) and in one end, and then after filling also in the other end, the so-called transversal sealing. There may then, at least for some types of milk packages, be a misalignment called a hammock in the transversal sealing (Figure 5.15). There is a target value for this, namely zero. The hammock can be in either direction, so the values can be positive or negative. Noise that against which the hammock should be robust include the position along the transversal sealing and whether the package is rotated, that is if the longitudinal sealing is in the centre of one side panel (as it should be) or not. A team of engineers performed an inner and outer array type DOE for this

(Table C.5). Analyse the data.