What is the difference between DLS Method and 'made in India' VJD Method in cricket?

Indians may not be familiar with their own ‘product’, the VJD method, as they are more exposed to the DLS method used in the Indian Premier League (IPL) and international matches. The VJD method is used as an alternative to the DLS method to determine target scores in rain-affected ODI and Twenty20 cricket matches.

In 2007, the technical committee of BCCI, headed by Sunil Gavaskar, first approved the VJD method for all limited-over domestic matches in India. Since then, it has been used in various domestic matches but never in the IPL. The rule was implemented in the recent Maharaja Trophy when the match between Hubli Tigers and Mangalore Dragons was interrupted by rain.

There were also reports that the BCCI was considering introducing this method in all domestic tournaments. However, many are still unaware of the VJD method, also known as the V Jayadevan system, and how it differs from the popular DLS method.

Also Read: Explained: What is VJD method and how does it work? BCCI to implement DLS alternative in domestic tournaments

What are the differences between DLS and VJD methods?

The DLS method determines the target score based on a mathematical formula that considers two key resources available to the batting team: overs remaining and number of wickets in hand. To calculate the percentage of remaining resources, a set of pre-determined tables is used.

The VJD method also considers overs left and wickets remaining to determine the target score, but different weighting is applied to these parameters. It uses a system of dynamic, nonlinear curves instead of fixed tables. This allows for adjustments that better reflect the nature of the game as it progresses.

Moreover, the VJD method obtains the target score by looking at the percentage of runs scored in each of the seven scoring phases (first 5 overs, 6-15 overs, 16 - 25, 26 -30, 31 - 40, 41 – 45, 46 -50). This method is essentially built around two curves: normal and target curves. The target curve, which is used to set revised targets, indicates how the batting side should accelerate after an interruption in the match.

Unless there is a sudden and significant change (a loss of wickets or a shift in the overs), the DLS method assumes a more linear scoring pattern. On the other hand, the VJD method provides a more accurate representation of potential scores.