Inconsistent Units

There is a seperate post explaining this behavior here:
Revit – Inconsistent Units and how to neutralize them.

Round Function In Formulas 
Values in formulas can be now rounded up or down. For example, when riser height is calculated, one needs the function “round” to find the appropriate value.
ROUND(x)
The round function returns a number rounded nearest to a whole number. It doesn’t take into consideration rounding direction (round up or down). If the number is (for example) from 24.5 to 24.9, the function rounds it to 25. If it is from 23.1 to 23.4, the function rounds it to 23.
Examples:
round ( 23.4) = 23
Round ( 23.5) = 24
Round ( 23.6) = 24
Round (-23.4) = -23
Round (-23.5) = -23
Round (-23.6) = -24
Syntax
The syntax for the round function is: round( number)
number is the number to round.
ROUNDDOWN(x)
“x” is a unitless value that should return the smallest integral value less than or equal to x.
For example:
rounddown ( 23.0) = 23
rounddown ( 23.5) = 23
rounddown ( 23.9) = 23
rounddown (-23.0) = -23
rounddown (-23.5) = -24
rounddown (-23.9) = -24
The syntax for the rounddown function is: rounddown (number)
number is the number to round down.
ROUNDUP(x)
“x” is a unitless value that should return the largest integral value greater than or equal to x.
For example:
roundup ( 23.0) = 23
roundup ( 23.5) = 24
roundup ( 23.9) = 24
roundup (-23.0) = -23
roundup (-23.5) = -23
roundup (-23.9) = -23
The syntax for the roundup function is: roundup (number)
number is the number to round up.
Note that when numbers such as 23.5 are rounded, they can result in either 23 or 24. To produce a stable result, for all the .5 cases, we round to the larger integer. That means that 23.5 is rounded to 24, while -23.5 to -23

New features in Revit 2016

• IFC links and rooms: When creating rooms in the host model, you can use many IFC-based elements to define room boundaries. See About Linking to IFC Files.
• Floors: To improve annotation and scheduling of architectural floors, the following fields are now available: Elevation at Top and Elevation at Bottom.
• Place Rooms: Use the Place Rooms Automatically tool to quickly place rooms in all closed and bounded areas on the current level. See Place Rooms Automatically.
• Rendering: When rendering a static 3D view, you can now choose between 2 rendering engines: NVIDIA mental ray and Autodesk Raytracer. Raytracer rendering does not support some quality and background options that are available with NVIDIA mental ray. See Workflow: Render Settings, About the Render Quality Setting, and Specify the Background for a Rendered Image
  Note: Autodesk Raytracer is an option for rendering a static image only. Revit continues to use the NVIDIA mental ray engine for functions such as: walkthrough export, FBX export, and previews (material appearance, RPC appearance, light color temperature, and decal).
• Energy Analysis for Autodesk® Revit® : (for Subscription customers)
  • To improve the workflow, the tools for Use Conceptual Mass Mode and Use Building Element Mode have been removed from the ribbon. Instead, select corresponding values for the Analysis Mode parameter on the Energy Settings dialog.
  • A new analysis mode, Use Conceptual Masses and Building Elements, allows you to perform energy analysis on a model that includes both types of design. This mode can be helpful, for example, when a design is partially detailed and partially conceptual, or when you have modeled conceptual masses to represent additions to an existing building.
  • When you select an analysis mode that includes building elements and then show the energy model, Revit creates 3 views: 3D Energy Model (a 3D view), Analytical Spaces (a schedule), and Analytical Surfaces (a schedule). Use these views to examine the analytical model and make adjustments before running the energy simulation.
  • In the Results and Compare window, the Energy Cost Range dashboard provides new analysis tools. Use this dashboard to understand the current energy cost of the analyzed building model, and how changes to identified variables can reduce the overall cost.
  • The Potential Energy Savings chart has been removed from the Energy Analysis Results. Instead, use the Energy Cost Range dashboard to learn similar information in a more interactive way.

  See Energy Analysis for Autodesk Revit.

• Remove Repeaters: Remove the repeater group from repeated adaptive components in your conceptual design. This leaves individual instances of the adaptive components in place. See Repeat Adaptive Components.

Referencing 3D Views in Plan

Source: RA10 Referencing 3D Views in Plan – NMcClure’s library

What Revit Wants: Structure for Architects – Beam System Tips

Structural Beam Systems are a very quick way to make your Architectural model more intelligent. Depending on your workflow and your consultants, it may be up toyou to ensure that structural elements are not interfering with your beautiful architecture.
Here is a few tips for using Structural Beam Systems:

• Structure usually holds up the roof – it is situated underneath a roof. In keeping with What Revit Wants – set the Workplane for the Beam system to the Underside of the Roof! Then, when the roof pitch changes, the Beam system will update. And you don’t have to mess around trying to match angles etc between the Beam system and the roof. Thanks AUGI.
• Work in 3D – this way you can see what is happening and see what Revit is doing.
• Use Fixed Distance / Centre justified and tweak the distance to ‘fill up’ the roof – this way you can get around the fact that Beam systems do not create an ‘edge’ beam by default.
• Have a look at the ‘International’ Revit content if you can’t find the structural families you need.
• If you are struggling to get a beam to the edge of the system, offset the system lines outwards by 50 or 100 mm.
• Keep in mind that an ‘Automatic’ Beam System needs a perimeter of structural beams to work nicely.
• If you need to, hack into and modify the Structural Beam Systems to suit your needs. For instance, you may not need the ‘Coarse’ heavy lines – just delete them out of the family and make the 3D extrusion visible in all modes (Coarse, Medium, Fine).
• Play with Object Styles to make the Structural Beams look nice in your Architectural documents.

Source: What Revit Wants: Structure for Architects – Beam System Tips