Duckworth Lewis Stern (DLS) is a system for generating revised targets in weather interrupted cricket games.
It provides two clear numbers:-
DLS Revised Target is a target for the team batting second where overs have been lost before and during the game
DLS Par provides a comparison figure at each over during the second innings to let players, umpires and spectators see the possibilities for a result. This figure only comes into play in determining a result where a game ends abruptly and no further play is possible.
Where weather affects the game and overs are lost, either
Two things must happen
The umpires must confirm with the scorers that they have entered the overs lost.
The game must not restart until this is done.
When those things are done the cricHQ app carries out the very complex calculations that are needed and determines the Revised Target
The scorers will then restart the game on the app and notify the umpires of the Revised Target.
The umpires should then share this with the captains.
Those numbers are to be accepted by scorers, umpires and players because cricHQ uses the latest professional level DLS calculators and the system is used in all senior league and cup games in GMCL to determine the targets in weather affected games in 20, 40, 45 and 50 over competitions.
Other stand alone DL or DLS calculator apps that are available may generate different numbers but the cricHQ version is the standard and must be used in all GMCL games.