A "simpler" plot can be developed from a brief premise and expanded to fill 15–16 hours of screen time. Making the substance of a narrative endure longer is not a straightforward process. A narrative twice as lengthy will take 6-8 times as long to write in order to keep the storyline and story aspects constant and entertaining. This means that a script has to be tight, focused, and intense to hold viewers' attention for so long. In addition, the production team needs more time to develop characters through dialogue, action, and emotion. The writer must convey certain ideas and emotions through settings, costumes, and music too. All this takes time, especially when you consider that a television show must also leave room for commercial breaks. A drama that lasts an hour per episode would need 75 minutes of real content which could be covered in only 20 episodes. A two-hour drama could be expanded to 30 hours but it wouldn't be enough time to tell all its stories or give them all the attention they deserve. Finally, a producer wants to avoid cutting corners by using recycled scripts or footage. If a similar situation arises again during production, he or she doesn't want to waste time re-writing or re-shooting scenes that already have been done. All in all, it takes about six months to write a good K-drama script because writing a longer one requires more effort and talent.