By Hannah Karp 

The music industry has long feted its star executives for their gut instinct and intuition. But for the past few years, the world's biggest record company has started evaluating employees by a less sexy measure: their interest in big data.

At Vivendi SA's Universal Music Group, a database built years ago by interns has evolved into a robust analysis tool that has become central to the company's business plan. Created to help employees make smarter marketing decisions, the system, known within the company as Artist Portal, allows users to track and compare artists' sales, streaming, social-media buzz and airplay globally in real time, while offering insight into the driving factors for spikes and dips in each metric.

By overlaying data sets such as an artist's television appearances and concert dates, airing times of TV shows or commercials featuring the artist's songs, social-media posts, Internet leaks, and the amount of money spent on promotion, marketing executives using the system can quickly see which efforts moved the needle and adjust their marketing plans accordingly.

The system also reveals which employees use the system most frequently and how, and which aren't using it at all--information that senior executives can turn to when making staffing decisions within their business units, according to a person familiar with the matter.

The music business might seem a bit late to the party, with industries from fast food to pharmaceuticals rarely making moves based on anything but the numbers. But Universal's system represents a sea change in an industry in which executives acknowledge that typical marketing presentations about an artist's traction until quite recently were based more on gut instinct and Google Inc. search results than on internal data--which could take days to painstakingly collect.

Universal's head of global digital business, Rob Wells, said he envisioned a world in which a band could exit the stage, go into its tour bus and see immediately how many of each one of its songs had been sold, streamed and shared during or after the performance. That isn't possible yet, he said, "but we're very close."

Joey Swarbrick, an artist manager whose clients include the British hip-hop duo Rizzle Kicks, said that he can now track airplay and preorders in real time instead of waiting for Universal to cough up weekly reports. In turn, that means he can "be more aggressive with the label--if I see that the record is connecting I can say we need to make sure we spend" more to promote it, he said. If a record isn't connecting, he added, he can advise against "throwing money down the drain."

Artist Portal was conceived about five years ago by two of Universal's technology experts, who said they were inspired by software that could scrape and aggregate information from multiple sites, just as travel websites do with airline prices. The first two versions of the system were built by company interns, both of whom have since been hired full-time. Now, two years into its third iteration, the database is still evolving as its architects work to clean up and organize new chunks of what the tech team calls "dirty, grubby" raw data and present it in a user-friendly way.

While the system isn't aimed at discovering new talent, it can be used to help forecast the potential of future signees, based on the trajectory of similar acts.

Universal's competitors, Access Industries' Warner Music Group and Sony Corp.'s Sony Music Entertainment, are catching up fast.

About a year ago Warner Music launched an early version of its Artist Dashboard, a system similar in functionality to Universal's. Warner's international head, Stu Bergen, said it is now being used by a broad swath of the company's marketing and promotion staff. Recently, he said, Warner gleaned from its system that one of its acts, a pop band from Los Angeles called Echosmith, was gaining remarkable traction in Southeast Asia, so the label decided to launch the artist there before the U.K. or Australia, more traditional starter markets overseas. Warner also plans to give artist managers access to the system when it can handle more users.

Sony Music Entertainment has also created dashboards that combine its artists' airplay, sales, social-media information and other data, but the company relies more heavily on human analysis of its data by an analytics team that has grown by roughly 50% to about 25 people over the past two years.

Sony also has a "social listening" system that quantifies buzz and interprets slang to give a better sense of how an artist is resonating in the social-media universe. It can decipher, for example, when fans are writing words like "bad," "sick" or "bitch" to convey criticism or praise.

The new analytics systems have shifted the industry's focus from sales to studying fans' listening habits. In Finland, for example, Universal has been using Artist Portal to persuade concert promoters to bring hip-hop acts to Helsinki, a tough sell in the past, because Finns have never bought many hip-hop records. But earlier this year Universal Music Finland's marketing director, Kimmo Valtanen, demonstrated for a group of local promoters that rap star Kanye West's hits were being streamed by Finnish fans with steady frequency, while his Finnish fan base was mostly between 18 and 24 years old and composed of equal parts male and female--indicating that Mr. West could sell out an arena there, said Mr. Valtanen.

No decision has been made yet on whether to book Mr. West into a coming show, which would be his first nonfestival headlining appearance in the nation.

"Everything used to be based on a feeling," Mr. Valtanen said. "Now we have the facts."

Write to Hannah Karp at hannah.karp@wsj.com

Access Investor Kit for Vivendi SA

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=FR0000127771

Access Investor Kit for Sony Corp.

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=JP3435000009

Access Investor Kit for Sony Corp.

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US8356993076

Access Investor Kit for Vivendi SA

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US92852T2015

Subscribe to WSJ: http://online.wsj.com?mod=djnwires