What problems could arise during maintenance if a large software system were designed in such a way that all of its data elements were global?

Problems during Maintenance Phase

Maintenance phase plays a vital role in the life cycle of software. It is expected that there are above 100 billion lines of code in production in the world. As much as 80% of it is unstructured, patched and not well documented. Maintenance can alleviate these problems.

Development of large software itself is a complex process because it had many huge steps and needs more focus than the small ones. Hence more employees work in large software in comparison to small ones. Also large software can't be developed in a synchronized way. It is possible that in the next step you will face some problem which you were not expecting. Hence, unexpected results and changes are frequently happens. Because of this, larger systems used to have more maintenance than the others do.

The management team of the large system used to hire more employees for the system to increase productivity and to reduce errors and flaws. More employees can divide their segments of working and work more effectively. The ways of maintenance also affect the result. If it is done in a proper way then less hard work can give you better results.