Cloud Computing is an ubiquitous model that enables clients to access different services in a fast and easy manner. In this context, one of the most used models is Software as a Service (SaaS), which means that software is deployed and provisioned to the customer via internet through a web browser on a pay per use mode. However, given its complexity and characteristics, such as reusability, scalability, flexibility and customization, SaaS may be defined by workflows, which consist of atomic services, or micro-services hosted geographically in different places. SaaS execution under this type of composition may lead to abnormal behavior or failures in the end user applications at runtime. This paper presents a new model of dynamic orchestration for SaaS, which aims to reduce failures or abnormal behavior of the services involved in the execution process of business application.

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Software as a Service (SaaS) is one of the services of the Computational Cloud that is generating an increase in production and competitive advantages in organizations. This is due to the ease of supply, delivery times and costs associated with its use. Allowing consumers to use them at the required time, under a pay-per-use model, achieving their business processes and reach their value goal.