This bachelor thesis explores how the composer handles and structures his composing based on pre-determined timeframes and how the composing process are affected by these given timeframes. The theory chapter brings up how short deadlines to compose affect how filmcomposers and other artists work when they create or compose. Previous studies bring up that composers want to write faster and be more efficient.  Three different musical pieces were composed to explore different lengths of pre-determined timeframes. Piece nr. 1 had a timeframe of 10 hours, piece nr.2 had a timeframe of 25 hours and piece nr. 3 had a timeframe of 50 hours to compose. All the pieces were written for a string quartet and had in addition to the timeframes a few other specific rules to follow.  The conclusion that came of this study was a deeper understanding of how pre-determined timeframes affect a composer’s creative process. A short timeframe gave the composer an intense couple of days of composing where the creative choices were based mostly from previous knowledge and inspiration of other musical pieces. A long timeframe gave the composer more time to reflect on the music that was written and a chance to explore new ideas. With a long timeframe the composer could challenge himself to create something entirely new. The short timeframe was easier to structure and be efficient on. The longer timeframes got harder to structure in terms of what the composer thought he could and would create in that amount of time.