Covance Inc. is engaged in drug development services. The Company provides a range of early-stage and late-stage product development services to the pharmaceutical and biotechnology industries. The Company also provides laboratory testing services to the chemical, agrochemical and food industries. The Company operates in two segments: early development services, and late-stage development services. The early development services include lead optimization services, preclinical services and clinical pharmacology services. The late-stage development services include central laboratory, Phase II-IV clinical development, and market access services.