Describir: The ECONOMIC and technical viability of various scales of building materials production

 _    _      ___       _____   _    _   __    __    _____     _  _    _    _   
| |  | ||   / _ \\    / ___// | || | || \ \\ / //  |  ___||  | \| || | || | || 
| |/\| ||  | / \ ||   \___ \\ | || | ||  \ \/ //   | ||__    |  ' || | || | || 
|  /\  ||  | \_/ ||   /    // | \\_/ ||   \  //    | ||__    | .  || | \\_/ || 
|_// \_||   \___//   /____//   \____//     \//     |_____||  |_|\_||  \____//  
`-`   `-`   `---`   `-----`     `---`       `      `-----`   `-` -`    `---`