The Miami Dolphins made a splash this offseason, spending roughly $175 million to upgrade the team. But the makeover gets completed this week.

The Dolphins have two approaches that govern how the team operates during the NFL draft.

The first is the use of a horizontal draft board, which stacks players up by position in different tiers.

"I don't go through the board and say, 'This guy over this guy over this guy over this guy over this guy.' I have the draft more horizontally by position (and) by round," General Manager Jeff Ireland said. "So if you're in a position where you have a guy at guard and you have a need at guard, he's up there, but you have maybe two other players at the same value then you might take the guard because it's a player of need."

The second is Ireland's approach of prioritizing the team's desires into "musts, needs and wants."

Here is a breakdown of the top five areas the Dolphins should upgrade, and a snapshot of the draft's landscape.

Offensive line: The Dolphins aren't certain that Jonathan Martin is a top shelf NFL starting left tackle, and have concerns about John Jerry's weight (340 pounds now), and fit in a zone blocking scheme.

Early options: Luke Joeckel, Eric Fisher and Lane Johnson are the three elite offensive tackles, but all three will likely be top 10 picks. Jonathan Cooper is the type of athletic guard this offense needs, but taking a guard that early isn't ideal.

Later Options: Syracuse's Justin Pugh, Oregon's Kyle Long, FSU's Menelik Watson, Arkansas-Pine Bluff's Terron Armstead, Colorado's David Bakhtiari, Florida's Xavier Nixon and UNC's Brennan Williams are the second-tier talents at one of the draft's deepest areas.