ɪɾ ɐlˈaʊz ɪŋkəmpˈæɾᵻbəl ˌæplɪkˈeɪʃənz tə ɹˈʌn sˈaɪd baɪ sˈaɪd, æt ðə sˈeɪm tˈaɪm ænd wɪð mˈɪnɪməl ɹᵻɡɹˈɛʃən tˈɛstɪŋ ɐɡˈɛnst wˈʌn ɐnˈʌðɚ.
It allows incompatible applications to run side by side, at the same time and with minimal regression testing against one another.