\(\theta_{0}^{\text{overall}}=\ w_{1}\text{\ .\ }\theta_{0}^{\text{Reception\ unit}}+w_{2}\text{\ .\ }\theta_{0}^{\text{Sampling\ unit}}+\ w_{3}\text{\ .\ }\theta_{0}^{\text{Test\ unit}}+\ w_{4}\text{\ .\ }\theta_{0}^{\text{\ Test\ results\ unit}}\text{\ \ }\) =
\(\frac{\text{sum\ weighted\ inputs\ of\ Reception\ unit\ }\text{.\ }\text{\ θ}_{0}^{\text{Reception\ unit}}+sum\ weighted\ inputs\ of\ Sampling\ unit\ .\ \text{\ θ}_{0}^{\text{Sampling\ unit}}+}{sum\ weighted\ inputs\ of\ (Reception\ unit+samplingt\ unit+Test\ unit+Test\ results\ unit)}\)
\(\frac{\text{sum\ weighted\ inputs\ of\ Test\ unit.\ }\text{\ θ}_{0}^{\text{Test\ unit}}+\ sum\ weighted\ inputs\ of\ Test\ results\ unit.\ \ \theta_{0}^{\text{\ Test\ results\ unit}}}{sum\ weighted\ inputs\ of\ (Reception\ unit+samplingt\ unit+Test\ unit+Test\ results\ unit)}\)