In general, six elements appear  purpose, type of data collected, method of data collection, design, method of data analysis, and reporting.
( ( In general ) ( , ( ( six elements ) ( ( appear ( ( purpose , ) ( type ( of ( ( ( ( ( ( ( ( ( ( data collected ) , ) ( method ( of ( data collection ) ) ) ) , ) design ) , ) ( method ( of ( data analysis ) ) ) ) , ) and ) reporting ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN general))) (, ,) (NP (CD six) (NNS elements)) (VP (VBP appear) (NP (NP (NN purpose)) (, ,) (NP (NP (NN type)) (PP (IN of) (NP (NP (NP (NNS data)) (VP (VBN collected))) (, ,) (NP (NP (NN method)) (PP (IN of) (NP (NN data) (NN collection)))) (, ,) (NP (NN design)) (, ,) (NP (NP (NN method)) (PP (IN of) (NP (NN data) (NN analysis)))) (, ,) (CC and) (NP (NN reporting))))))) (. .)))
Breaking it down into 6 elements has always been helpful for students and professionals.
( ( ( ( Breaking it ) down ) ( into ( 6 elements ) ) ) ( ( ( has always ) ( ( been helpful ) ( for ( ( students and ) professionals ) ) ) ) . ) )
(ROOT (S (S (VP (VBG Breaking) (NP (PRP it)) (PRT (RP down)) (PP (IN into) (NP (CD 6) (NNS elements))))) (VP (VBZ has) (ADVP (RB always)) (VP (VBN been) (ADJP (JJ helpful)) (PP (IN for) (NP (NNS students) (CC and) (NNS professionals))))) (. .)))