In this chapter you learned techniques to combine jobs and transformations in different ways.
First, you learned to define your own variables at run time. You defined variables in one transformation and then used them in other jobs and/or transformations. You also learned to define different scopes for those variables.
After that, you learned to isolate part of a transformation as a subtransformation. You also learned to implement process flows by copying and getting rows, and how to nest jobs. By using all these PDI capabilities, your work will look cleaner and will be more organized.
Finally, you learned to iterate the execution of jobs and transformations.
Let's say that this was a really productive chapter. By now, you should be equipped with enough knowledge to use PDI for developing most of your requirements.
You're now ready for the next chapter, where you will develop the final project that will allow you to review a little of everything you've learned throughout the book.