Scheduling Worldwide™ by 4Service™ | 3,595 followers on LinkedIn. We aim to make Service in the World better! | Scheduling Worldwide is a global market research company. We are Elite members of the Mystery Shopping Providers Association (MSPA) and two times in a row ESOMAR membership. We are an integral but separate part of 4Service™ Group, which has been delivering mystery shopping services to hundreds of Eastern European clients for 19 years.