As a caveat, however, these are not the only changes needed in eyewitness identification. As eyewitness evidence expert and Prof. Gary Wells says,

Regardless of whether one uses a simultaneous or sequential procedure, there are other important problems with lineups that have to be addressed. These other problems include: instructions to eyewitnesses, the selection of lineup fillers, how witness certainty is assessed, how to eliminate inadvertent influences from the lineup administrator, what records must be kept, and so on. Fixation on the sequential procedure is creating a certain degree of myopia with regard to seeing the broad problems with lineups.

For more on this topic, check out the 1999 Eyewitness Evidence: A Guide for Law Enforcment. Published by the National Institute of Justice, it outlines basic procedures for police to use to obtain the most reliable and accurate information from eyewitnesses.