The authors trace the definition and challenges of ''service integrati
on,'' variously known over time as ''collaboration,'' ''coordination,'
' ''human services integration,'' and ''one-stop shopping.'' While the
common use of service integration terminology currently may seem to i
ndicate a consensus in favor of a broad systemic reform, motivations a
nd expectations for service integration differ significantly among dif
ferent players in the service system. The authors conclude that servic
e integration cannot be defined by a particular service model or outco
me, but instead should be conceived of as an ongoing reform process. T
his process, when well-designed and implemented with long-term vision,
can reduce duplication, strengthen communities, and improve client ou
tcomes.