All managerial decisions are taken on the basis of the information that is available. It is important that managers use appropriate information to base their decisions upon about service provision to ensure efficient use of resources. This basic premise serves as a framework for examining how quantitative and qualitative information can be of help to nurse managers in taking these decisions in the context of developing services for informal carers. The current emphasis on surveys as a means of assessing client need is questioned and it is suggested that a wealth of evidence, relating to the experience of carers, already exists. Examples of accounts which express the needs of informal carers are presented and their utility, in terms of highlighting the carers' perspective, is discussed to reinforce the importance of utilizing this information. The paper concludes that nurse managers can use these sources as a basis for decision-making in the area of service provision and this may result in a more effective use of resources through a needs-based approach.