It did not seem meaningful for me when I saw a special usage of preposition to within a context. For example:
Based on the performance scores in Phase I and the optimal number of stakeholders to be utilized in Phase II, the optimal routing of material from selected suppliers to manufacturers to warehouses were identified.
Is it OK for to to come twice almost consecutively? If so, then what does the last part of the above text (...from selected to...to...) mean?