Like a carnival, the core attractions will have a cohesive tone to attract the primary audience and convince them to participate. The core attraction in the narrative is often one of primary narrative themes; good versus evil, man versus nature etc. The premise conflict is the primary spectacle to draw the attention of an audience.
The creator of the work is no different than the ring master or the carnival manager. Every attraction has it's purpose, if it under-performs than it shall be cut. To the writer these are the revisions.
Once the audience can identify the major attractions they begin to explore the carnival. Not every attraction will suit every participant but every attraction should be able to obtain its' own crowd. These smaller attractions are designed to hold the attention of attendees until the they can experience the major spectacles. These attractions are often conceptualized character conflicts that examine both external and internal contention. Relationships, feuding friends moral dilemmas all orchestrated to maintain the attention of the masses.
As the attractions are selected and assembled the arrangement becomes key. If there are too many attractions the participants will grow tired before experiencing the full extent of the project. If there are too few attractions they will lose interest quickly. Spacing the attractions out at regular intervals will keep the interest of participants and maintain the tone.
When the architect begins crafting their piece, they must ask is this a sufficient spectacle to draw the crowd? Are the attractions enough to entertain? Is the main attraction a ride that others want to take?