Questione giuridica chiave
Whether the arbitral tribunal violated Art. 190(2)(c) PILA by deciding beyond the sellers' request for relief.
Decisione estratta
No. The petition sought joint and several payment, which also encompassed liability of X.________ SA alone; awarding payment only against X.________ SA stayed within the claim.
Motivazione estratta
The introductory wording of the request was part of the reasoning for the payment claim, not an independent declaratory claim. A joint and several claim allows enforcement against each debtor individually, so the tribunal did not grant more or something different from what was sought.