Created by then-High Representative Carlos Westendorp in 1999, PBS has remained more of a concept than a reality, for reasons ranging from lack of money to governments' missing deadlines to international community ad hoc solutions.
PBS, osmišljen 1999. godine od strane tadašnjeg Visokog predstavnika Carlosa Westendorpa, ostao je više koncept negoli realnost zbog razloga koji se kreću u rasponu od pomanjkanja sredstava do vladinog nepoštivanja rokova i ad hoc rješenja međunarodne zajednice.