The decreasing lead time of the quick-line plant makes it competitive at a lower inventory carrying cost.
( ( ( The ( decreasing ( lead time ) ) ) ( of ( the ( quick-line plant ) ) ) ) ( ( makes ( it ( ( competitive ( at ( a ( lower inventory ) ) ) ) ( carrying cost ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (VBG decreasing) (JJ lead) (NN time)) (PP (IN of) (NP (DT the) (JJ quick-line) (NN plant)))) (VP (VBZ makes) (S (NP (PRP it)) (ADJP (JJ competitive) (PP (IN at) (NP (DT a) (JJR lower) (NN inventory)))) (S (VP (VBG carrying) (NP (NN cost)))))) (. .)))
Low inventory helps decrease lead time. 
( ( Low inventory ) ( ( helps ( decrease ( lead time ) ) ) . ) )
(ROOT (S (NP (NNP Low) (NN inventory)) (VP (VBZ helps) (VP (VB decrease) (NP (JJ lead) (NN time)))) (. .)))