If any of the officials happen to mark up the memos with thoughts and concerns, new versions and new rounds of signatures become necessary.

The memos are intended to help the mayor’s office control high-level decision-making across the sprawling apparatus of New York City government.

They provide a look at the behind-the-scenes methods by which Mr. de Blasio — a Democrat steeped in Washington politics, but lacking in experience leading a large organization — has coped with the flood of information and demands flowing into his office.

The memos, a feature of the White House with roots at least as far back as the Carter administration, are also the most striking managerial innovation brought by Mr. de Blasio, who has faced criticism for the slow pace of his decision-making.