Each SA contains an objective or objectives, which provide the context in which the requirements of the Standards on Auditing are set. Any limitation of the applicability of a specific Standard is made clear in the Standard itself. An individual Standard should be read in the context of the objective stated in the Standard as well as this Preface. The auditor aims to achieve these objectives, having regard to the interrelationships amongst the SAs. For this purpose, the auditor uses the objectives to judge whether, having complied with the requirements of the SAs, sufficient appropriate audit evidence has been obtained in the context of the overall objective of the auditor. Where an individual objective has not been or cannot be achieved, the auditor considers whether this prevents the auditor from achieving his overall objective.