This book looks at the basic core skills that all those dealing with suppliers and clients need to know about managing the commercial relationship. It looks at the skills needed to ensure that both the supplier and customers are equipped to deal with:- change control, - price re-negotiations, - costings, - delivery of services, - performance management and negotiation techniques. It explains the basic types of contract; why they are used and their particular characteristics. It focuses on more complex contracts such as technology contracts. It provides a basic lingua franca for all those dealing in this increasingly important field and demonstrates that all levels of the organization are able to have a significant impact on how contracts can be run more efficiently.