Putting it all together
Simulated AB's puts together all the batting practice training segments into one complete At bat. With the simulated AB, the hitter will work his "hitting plan" i.e he will look for his pitch until two strikes and then with two strikes will shorten his swing and work his two strike reactive hitting approach. The batter also must recognize pitch and location with the simulated AB - he can't be on "auto pilot" as is the case sometimes with "grooved" batting practice. All facets of hitting are trained with the simulated AB.
Pitching.
Simulated At Bats must be live pitched. From the pitcher's perspective, he needs to treat each AB as if it were a real game. The pitcher needs to try to get ahead of the batter and to fool the batter etc... The pitcher should pay attention to the hitter, if the hitter is sitting on a fastball then he will need recognize this and throw off speed pitches - whatever it takes to duplicate real game hitting.
The pitch break down should reflect what the hitter would normally see in a real game. In the above example the pitcher is throwing 67% fast balls , 16.5 % curve balls and 16.5% change ups. A "junk" pitcher may look at little different (perhaps fast ball 1,2 curve ball 3,4 and change up 5,6). A little leaguer may not see any curve balls so that would be eliminated for him. The key is too get the pitch mix close to real game percentages.
Score the batter's hitting numbers
Use a score book and keep score as you would for a game. Record walks, strike outs, hits, outs (runs scored is not important here - it is all about the hitting only). Calculate the batter's two strike battting average and his overall batting average this may tell you something about these two approaches. If the batter for example is hitting .400 with less than two strikes and .200 with two strikes, he may want to work more on his reactive two strike hitting approach etc... Also calculate the batter's strike out ratio and on base percentage. Hits are generally line drives and big flies, everything else is an out.
Multiple hitters
If there are two or more hitters participating in this batting practice, have them rotate them as they would in a batting lineup in a game i.e. hit one AB at a time , then the next hitter hits etc.. each hitting in turn.