Constructing the General Computation Scheme

From the core design we are now able to construct a general computation scheme in which we omit all the 1 and introduce a common factor, z0, as well as the interaction of pairs of factors, e.g. ziz2. The factor z0 is assumed to be present independently of the variation of the planned factors z and z2. It may, e.g., be considered as a blank value or a basic level of contamination. The interaction of factors is expected to be important in antagonistic or synergistic effects. 

For z0 we simply set +1 for each measurement this means that the overall factor gives each measurement the constant weightj+1 f. To obtain the interaction column we multiply the values (+1 or 1) of the respective factor columns  

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