# How does the Duckworth-Lewis-Stern (DLS) Method Work? | Explained

The Duckworth-Lewis-Stern (DLS) method proves to be a valuable mathematical tool in limited-overs cricket matches affected by weather or other disruptions. Originally known as the Duckworth-Lewis method (D/L), it was created by Frank Duckworth and Tony Lewis, both renowned English statisticians.

Back in 1997, they crafted this ingenious system, which later gained official recognition from the ICC in 1999. The main objective of DLS is to calculate a revised target score, ensuring a fair and balanced opportunity for the team batting second to chase down the required runs and achieve victory.

## Understanding the DLS Method

The DLS method has become an essential aspect of modern limited-overs cricket. It sparks diverse opinions among fans, ranging from those who grasp its concept and calculation intricacies to others who rely solely on readily available DLS calculators. The varied responses arise from different levels of comprehension and the perception of its complexity or necessity.

DLS in cricket matches is not just about understanding the calculations involved; it primarily hinges on knowing the right moments to implement it. While the calculations themselves can be facilitated through readily available calculators, the key lies in identifying the precise instances when DLS should come into play.

Let’s delve deeper into this crucial aspect of the DLS method.

To begin with, it’s essential to understand that DLS comes into play when recalculating the target for the team batting second due to revised overs during the match. It’s crucial to emphasize that DLS is only applied when the overs are altered after the game has started. While certain situations are evident and uncomplicated, others may need more clarity.

Also Read: What is Umpireβs Call in DRS Decisions?

## Using the DLS Method

So, let’s delve into each situation, starting with the straightforward ones and gradually exploring more complex cases for clearer comprehension.

### Situation #1

Imagine a cricket match is in progress, and suddenly, rain interrupts the innings of the team batting second. After a brief delay, the weather clears up, and the match resumes, but with a reduced number of overs for each team.

During this resumption, a vital aspect comes into play β the Duckworth-Lewis-Stern (DLS) method. This method is utilized to calculate a revised target for the team batting second, given the reduction in overs due to the interruption.

The original target that was set before the rain interruption is no longer valid or applicable. In such situations, the DLS method becomes crucial for determining a fair and challenging target for the team batting second. It takes into account the number of overs lost due to the rain delay and recalculates a new target based on the available resources and playing conditions.

### Situation #2

Imagine a cricket match where the team batting second faces an unfortunate interruption and the weather doesn’t allow any further play. In such a situation, one crucial factor comes into play β the number of overs bowled before the interruption occurred.

If the number of overs bowled by the team batting second is at least equal to the minimum required to constitute a game, which is 20 overs in a One Day International (ODI) and 5 overs in a Twenty20 International (T20I), then the result of the match will be determined using the Duckworth-Lewis-Stern (DLS) method, regardless of the actual target set before the interruption.

### Situation #3

Imagine a thrilling cricket match where the team batting second is on a chase, facing a revised target due to a previous interruption. However, just as the game starts to pick up pace, another interruption occurs, further altering the number of overs available. In such a scenario, the DLS method comes into play to determine a new re-revised target for the team batting second.

As the players take the field again after the interruption, the overs are once again revised to account for the additional break in play. With these changes in the match conditions, the previously calculated revised target becomes obsolete and no longer applicable. This is where the DLS method steps in to bring clarity and fairness to the match proceedings.

The DLS method considers the current match situation, the number of overs remaining, and the resources available to both teams. By factoring in these variables, it calculates a fresh target for the chasing team that reflects the impact of the latest interruption.

In both Situation #1 and Situation #3, it is crucial to emphasize that the application of the DLS method becomes necessary whenever an interruption occurs, leading to a revision of overs in cricket matches.

### Situation #4

The match finally began after a delayed start but with a reduced number of overs. Fortunately, there were no further interruptions during the game, so the match progressed like a regular one without any involvement of the DLS method to adjust the target.

In this situation, whatever target the team batting first sets at the end of their innings remains unchanged for the team batting second. The game continues with the revised overs, and both teams play with the same target in mind.

Now, let’s delve into the next few situations, which are not only interesting but also critical. These situations pertain to revising the overs for the team batting first due to interruptions during their innings.

### Situation #5

The cricket match began as planned with the designated number of overs. However, during the innings of the team batting first, an interruption occurred, causing a temporary halt. Subsequently, the game resumed, but with a revised number of overs.

Despite the interruption and resumption occurring during the first team’s batting innings, the DLS method comes into play at the conclusion of their innings. It is utilized to calculate a fresh target for the team batting second. This adjusted target ensures a fair and competitive match outcome despite the earlier disruption.

### Situation #6

The match encountered a delayed start, resulting in a reduction in the number of overs. However, despite the setback, the game eventually began with the adjusted overs.

During the first innings of the team at the crease, an interruption occurred, causing further adjustments to the remaining overs. Once the game resumed, the DLS method came into play once again to calculate a new target for the team batting second, ensuring a fair and competitive match.

The DLS method is employed in situations #5 and #6 based on the number of overs the game started with. These scenarios encompass all possible situations in a cricket match that necessitate the use of the DLS method to reach a conclusion.

It’s worth noting that in BCCI’s domestic games, the V. Jayadevan (VJD) method is used instead of the DLS method. While the computation methods may differ between the two systems, the principles of “when to use it” remain unchanged.