This document provides an overview of Java Batch and how it can be used for cost optimized efficiency. It discusses why batch processing is important, how the Java Batch specification (JSR 352) defines a standard programming model, and how IBM's Java Batch offerings can help achieve business efficiency through a balanced blend of batch and online processing. Key concepts covered include the Java Batch programming model of readers, processors, writers and chunks, job parallelization, checkpointing, and best practices for designing batch applications. Customer examples demonstrate how Java Batch has been used for modernizing legacy batch jobs and optimizing batch windows.