You can find out when most of the Mersch families immigrated to the United States. You can focus your search to immigration records dating from that era. Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival and destination.
What is a System Requirements Specification (SRS)? A System Requirements Specification (SRS) (also known as a Software Requirements Specification) is a document or set of documentation that describes the features and behavior of a system or software application.
A functional requirement describes what a software system should do, while non-functional requirements place constraints on how the system will do so. Let me elaborate.unctional Requirements: specify the functionality of the system. (e.g. fields in a form). Non-functional Requirements: specify the quality of the system, is mostly related to the satisfiability of the user. (e.g. minimium acceptable page load time). I got the above information from this link.