Head lettuce planning from Johnnys'
Here is a good introduction to planning a year-round head lettuce production program. Not comprehensive, but an excellent insight into crop planning that can be adapted to other short-season crops for commercial markets. By changing the database, a similar program could be applied to potatoes, carrots, and other vegetables with a wide variety of cultivars with differing cultural and seasonal requirements.
Here is a link that might be useful: Head lettuce planning guide