The author proposes extensions to the Scrum process model to add formal requirements and test case management, with requirements and test case work items that have their own state transition (e.g. âNot Implementedâ, âPartially Implementedâ, âFully Implementedâ).
In order to calculate the time of travel with this speed from Earth to Mars, we need to know the distance. When the Mars and the Earth are at the opposite sides of the Sun, the distance is the largest: approximately: 378 million km. The time needed for an electromagnetic wave to cover this distance is approximately: 21 minute. The closest distance between Mars and Earth is 78 million km, the time in this case is: 4.3 min.
If all the planets were in a row then if would only take 4 minutes because in this position, however this postion is just as common as when the Earth and Mars are on opposite sides of the Sun. In this position it takes 24 minutes for information to travel because Earth and Mars are 24 light minutes. So on average the Earth and Mars are 14 light minutes away so on average a message from Mars would take from 4 to 24 minutes to reach Earth.