außerplanmäßig

• ausserplanmässig (Switzerland, Liechtenstein)

außer +‎ planmäßig

• IPA^(key): /ˈaʊ̯sɐplaːnˌmɛːsɪç/ (standard; used naturally in western Germany and Switzerland)
• IPA^(key): /-ˌmeːsɪç/ (overall more common; particularly northern and eastern regions)
• IPA^(key): /-ˌmɛːsɪk/ (common form in southern Germany, Austria, and Switzerland)

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• Hyphenation: au‧ßer‧plan‧mä‧ßig

außerplanmäßig (strong nominative masculine singular außerplanmäßiger, not comparable)

1. unplanned, unscheduled