Vladimir,
how does spider handle different costs of the same material/resource in portfolios. Let's take a concrete of class 8/10 (C8/10). If for one project the cost of pouring the concrete are 53.8 euro/m3 and for another the cost is 68.99 euro/m3, how does spider handle this when I create a portfolio using the 2 previous mentioned projects. To be more precise do I have to create 2 materials (with different codes)?
Best Regards,
Bogdan