Your company is a dynamic organization that depends on using standard project management techniques as prescribed by PMBOK in managing series of projects to keep its IT infrastructure in alignment with its business goals. Your company has decided to use the earned value management (EVM) technique to monitor and control projects. In a report of 2–3 pages, complete the following: Define the concepts of cost variance and schedule variance. Demonstrate your understanding of EVM by using appropriate examples to illustrate the schedule performance index (SPI). Analyze how knowledge of the SPI will help you as a project manager in controlling the project and ensuring that it is completed within the scheduled target. Complete your paper and reference sources using APA style. For more information on APA style, please visit the APA Style Lab.