There is no silver bullet method for legacy modernization. The best approach obviously depends on the problem that need to be solved. But before solving it, the problem must be clearly identified. Gartner defines ๐๐ถ๐ ๐บ๐ฎ๐ถ๐ป ๐ฑ๐ฟ๐ถ๐๐ฒ๐ฟ๐ ๐ณ๐ผ๐ฟ ๐ฒ๐๐ฎ๐น๐๐ฎ๐๐ถ๐ป๐ด ๐ฎ๐ฝ๐ฝ๐น๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป ๐บ๐ผ๐ฑ๐ฒ๐ฟ๐ป๐ถ๐๐ฎ๐๐ถ๐ผ๐ป.
The first three of these drivers code from business perspective: ๐ฏ๐๐๐ถ๐ป๐ฒ๐๐ ๐ณ๐ถ๐, ๐ฏ๐๐๐ถ๐ป๐ฒ๐๐ ๐๐ฎ๐น๐๐ฒ and ๐ฎ๐ด๐ถ๐น๐ถ๐๐ – meaning that if the legacy application is not meeting the new requirements imposed by digital business, it needs to be modernized to fit properly and should be upgraded to provide greater business value. Applications that lack the agility to keep pace with the demands of digital business may be a cost or risk liability.
The three other drivers come from the IT perspective, and involve ๐๐จ๐ฌ๐ญ, ๐๐จ๐ฆ๐ฉ๐ฅ๐๐ฑ๐ข๐ญ๐ฒ and ๐ซ๐ข๐ฌ๐ค. If the total cost of ownership is too high, the technology too complex, or security, compliance, support or scalability are being compromised, itโs time to modernize.
๐ง๐ต๐ฒ ๐ฏ๐ฒ๐๐ ๐บ๐ผ๐ฑ๐ฒ๐ฟ๐ป๐ถ๐๐ฎ๐๐ถ๐ผ๐ป ๐ผ๐ฝ๐ฝ๐ผ๐ฟ๐๐๐ป๐ถ๐๐ถ๐ฒ๐ ๐ฎ๐ฟ๐ฒ ๐๐ต๐ผ๐๐ฒ ๐๐ถ๐๐ต ๐บ๐๐น๐๐ถ๐ฝ๐น๐ฒ ๐ฑ๐ฟ๐ถ๐๐ฒ๐ฟ๐ ๐ณ๐ฟ๐ผ๐บ ๐ฏ๐ผ๐๐ต ๐ฎ ๐ฏ๐๐๐ถ๐ป๐ฒ๐๐ ๐ฎ๐ป๐ฑ ๐ฎ๐ป ๐๐ง ๐ฝ๐ฒ๐ฟ๐๐ฝ๐ฒ๐ฐ๐๐ถ๐๐ฒ.