Single-window system Single-window system The single-window system is a trade facilitation idea. As such, the implementation of a single window system enables international (cross-border) traders to submit regulatory documents at a single location and/or single entity. Such documents are typically customs declarations, applications for import/export permits, and other supporting documents such as certificates of origin and trading invoices. The main value proposition for having a single window for a country or economy is to increase the efficiency through time and cost savings for traders in their dealings with government authorities for obtaining the relevant clearance and permit(s) for moving cargoes across national
Single-entry single-exit Single-entry single-exit In graph theory, a single-entry single-exit (SESE) region in a given graph is an ordered edge pair ("a", "b") of distinct control flow edges "a" and "b" where: where a node "x" is said to dominate node "y" in a directed graph if every path from start to "y" includes "x". A node "x" is said to postdominate a node "y" if every path from "y" to end includes "x". So, "a" and "b" refer to the entry and exit edge, respectively. The first condition ensures that every path from start into the region passes through the region’s