In the planning and design stages of a project, various design estimates reflect the progress of the design. At the very early stage, the screening estimate or order of magnitude estimate is usually made before the facility is designed, and must therefore rely on the cost data of similar facilities built in the past.
Ammon /am-mon/ [2 sylls.] as a boys' name is pronounced AY-mon. It is of Hebrew origin, and the meaning of Ammon is teacher, builder. Biblical: one of the sons of David. Also a place name for a country northeast of the Dead Sea.
Greek ammos (sand) is believed to be related to Ammon, and the Latin word for sand, arena, resembles the word Aries. Latin harena, arena, was the place of combat (literally 'place strewn with sand'). The arena was the area in the center of an ancient Roman amphitheater where contests and other spectacles were held.