I really think PHs ought to operate as if they were making mega-movies or tele-novellas for the TV medium:
1. Have a complete story, start to finish, with each part broken down into episode 'arcs'; i.e. 10 episodes (2 weeks) dealing with one issue progressing to next part of story and so on.
2. This limits the show to no more than 6 months...though 3 months is where I have seen Soaps break down, let's give them an addition 3 months if this is a set ime-limit production
3. Find backing; i.e. sponsors; and get production team in place.
4. Sell the idea to a channel.
5. Cast for leads and other actors.
6. Start and finish with one director, who has the entire story in his/her mind and work it like it is a movie, setting the tone for the last scene from the opening scene onward.
This will greatly improve story, acting, direction, creativity, and remove a lot of headaches for PHs and production/creative teams.
This also enables stories to be based on the current times (not regressive); showcases new and emerging talent instead of the same faces year after year, and greatly improves creativity.
This model works successfully in many countries; Korea, for instance, or Spanish television which has a lot of tele-novellas.
The temptation is always there to prolong the show even past its story-line when it has very high ratings, because the channel is making money, the PH is making money and the viewers are loving it.
This is where self-discipline comes into play and the channel and PH must remain firm and cut it off at the pre-determined date.
There will be more shows cued to start that may do equally well, and the PH can always come back with more shows.
Jayne