Assist Ratio is the percentage of a team’s possessions that ends in an assist.

Assist Ratio Formula=(Assists)*100)/ [(Field Goal Attempts)+(Free Throw Attempts*0.44)+(Assists)+(Turnovers)]

The Herfindahl Index (HHI) can be used to measure scoring balances for NBA teams.

HHI calculation for each team: (1) divide each player's points scored by the total number of points scored by the team, (2) square that result for each player, (3) sum those squares.

The method that relates winning percentage to points scored, points allowed, the standard deviations of points scored and allowed, and the correlation between points scored and allowed.

Correlated Gaussian Winning Percentage Formula=(Points Scored-Points Allowed)/[Standart Deviation{Points Scored-Points Allowed}]

The number of points a team allows per 100 opposing team possessions.

 Defensive Efficiency Fomula=100*(Points Allowed/Opponent Possessions)

The metric of a team's ability to get defensive rebounds.

Defensive Rebounding Percentage Formula=(Team Defensive Rebounds)/[(Team Defensive Rebounds)+Opponent's Offensive Rebounds)]

The metric which combines 2-point shots with 3-point shots.

Effective Field Goal Percentage Formula=[(Field Goals Made) + 0.5*(3P Field Goals Made)]/(Field Goal Attempts) 

The numerical gap between a team's offensive efficiency and defensive efficiency. The differential represents what each team did for the entire season and a team’s efficiency differential is a better predictor of future success.

Efficiency Differential Formula=(Offensive Efficiency)-(Defensive Efficiency)

The key factors which help get a better understanding of what wins a basketball game. These factors can be used to help identify a team’s strategic strengths and weaknesses.

• Shooting the ball

Effective Field Goal Percentage=(Field Goals Made) + 0.5*3P Field Goals Made))/(Field Goal Attempts)

• Taking care of the ball

(Turnovers)/(Possessions)

• Offensive rebounding

Offensive Reboundin Percentage = (Offensive Rebounds)/(Offensive Rebounds)+(Opponent's Defensive Rebounds)

• Getting to the foul line

(Free Throw Attempts)/(Field Goals Attempts) or FTA/FGA

The ability to get to the free throw line, and the ability to make free throws. Two metrics are used the measure free throw conversion.

(Free Throws Attempted)/(Field Goal Attempts) explains how often a team shoots free throws

(Free Throws Made)/(Field Goal Attempts) explains how well a team shoots at the line in addition to how often they get there

The Lenovo Stat is a plus/minus statistic that looks at the point differential when players are both in and out of the game, to see how the team performs with various combinations. It's a way of showing the best-engineered/best combination of players on the court.  The Lenovo Stat can look at a variety of combinations including the best two player, three player and even five player combinations for each game.

The number of points a team scores per 100 possessions.

Offensive Efficiency Formula=100*(Points Scored)/(Possessions)

The metric of a team's ability to get offensive rebounds.

Offensive Rebounding Percentage Formula=(Offensive Rebounds)/(Offensive Rebounds + Opponent's Defensive Rebounds)

The total number of possessions a team uses in a game.

Pace Formula=[240/(Team Minutes)]*(Possession_team+Possession_opponent)/2

The metric that indicates the percentage of the time a team will score if not sent to the free throw line. Scoring possessions minus scoring possessions on which no field goal was made (only free throws), divided by possessions minus scoring possessions on which no field goal was made.

Play Percent Formula= Field Goals Made/(Field Goals Attempted-Offensive Rebounds+Turnovers)

The numerical gap between points scored and points allowed. Wins in close games tend not to reflect a team's true skill. Teams that start the season with a better record than their point differential tend to slow down and vice versa. Point differential is also a better predictor of future performance than win-loss record.

Point Differential Formula=(Points Scored)-(Points Allowed)

When a team commits a turnover, the scoring crew records the turnover. On the following opponent possession, if the opponent scores, the scoring system credits that opponent with a "point off a turnover.

Arguably the most important discovery in statistical analytics in basketball. 

A possession ends

(1) by making a field goal attempt;

(2) by missing a shot and not getting the offensive rebound;

(3) by turning the ball over;

(4) by going to the line for two or three shots and either making the last shot or not getting the rebound of a missed last shot.

Two teams in any given games are essentially limited to the same number of possessions.

Basic Possession Formula=0.96*[(Field Goal Attempts)+(Turnovers)+0.44*(Free Throw Attempts)-(Offensive Rebounds)]

More Specific Possession Formula=(Field Goal Attempts)+(Turnovers)+0.44*(Free Throw Attempts) - 1.07*(Offensive Rebounding Percentage)*(Missed Shots)

A subjective evaluation tool for the NBA teams which rates the entire league from top to bottom. NBA power rankings are based mostly on how good teams really are, with recent performances taken into partial consideration. The NBA.com does the power rankings job by using the offensive and defensive efficiencies.

At NBAstuffer.com you can find the NBA Teams' power rankings in graphics form which helps readers get a better understanding about exactly where the team currently stands.

The method that gives an expected winning percentage using the ratio of a team's wins and losses is related to the number of points scored and allowed.

Expected Winning Percentage Formula=(Points Scored)^16.5/[Points Scored)^16.5 + (Points Allowed)^16.5)]

The Relative Percentage Index (RPI) is widely used to produce power ratings. Unlike most power rating systems, the RPI does not consider margin of victory or how well a team has played. It only considers whether a team won or lost. In fact, the RPI is based entirely on winning percentage.

It essentially measures a team’s strength of schedule and how a team does against that schedule. It is based 25% on a team’s winning percentage, 50% on the winning percentage of their opponents, and 25% on the winning percentage of their opponent’s opponents.

Rating Percentage Index (RPI) Formula=.25*(Team's Winning Percentage)+.50*(Opponents'  Average Winning Percentage)+0.25*(Opponents' Opponents'  Average Winning Percentage)

For example if;
Atlanta is 4-1 (W/L Pct= .800)
Atlanta's opponents averaged a 12-8 (W/L Pct.= .600) record
Atlanta's opponents' opponents averaged a 64-16 (W/L Pct = .800) record, then,
RPI for Atlanta is = (0.25 * .800) + (0.5 * .600) + (0.25 * .800)=.700

A metric which represents a team's average schedule difficulty faced by each team in the games that it's played so far. The schedule difficulty of a given game takes into account the rating of the opponent and the location of the game. Strength of schedule can be calculated by compiling the win/ loss records and the current power ratings of the team's opponents. The greater the SOS number, the more difficult a schedule that team has.

Strength Of Schedule (SOS) Formula= (2/3)* (Opponents' Average Winning Percentage)+ (1/3)*(Opponents' Opponents' Average Winning Percentage)

Turnover Ratio is the percentage of a team’s possessions that end in a turnover.

Turnover Ratio Formula=(Assists)*100)/ [(Field Goal Attempts)+(Free Throw Attempts*0.44)+(Assists)+(Turnovers)]