Text this: Redundancy allocation for series-parallel warm-standby systems

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