Blog SOLIDWORKS 2015 - The What's New You Didn't Hear About (Part 06 - Selective Delete in Assemblies)
With each version of SOLIDWORKS the development team along with the product definition specialist sorts through the vast number of your enhancement requests. Doing a great to job for the most part to do what we ask of them; make it better, faster and more stable. Several customers asked for a quicker way to remove sub-assemblies and/or components of sub-assemblies. I found this enhancement to be pretty fast and with little intrusion on my design process. Let's take a look at it from SOLIDWORKS 2014 first.
SOLIDWORKS 2014 Removing Sub-Assemblies
1.Right mouse button on the sub-assembly in the 
2.Select the sub-assembly in the feature manager design tree and hit the "delete" key on the keyboard
3.Right mouse button click on any component of the sub-assembly and click "Select Sub-Assembly". Then hit "Delete" on the keyboard. 
SOLIDWORKS 2014 Removing Components in Sub-Assemblies
1.Select the Components from the 
2.Select the Components in the feature manager design tree or the graphics window and hit the "delete" key on the keyboard 
SOLIDWORKS 2015 Removing Components / Sub-Assemblies
Now with SOLIDWORKS 2015 you have the option when you delete components of a sub-assembly to delete either the assembly or the components selected. 
I hope you enjoy,
Bob McGaughey, CSWE
Technical Applications Manager
Computer Aided Technology,
What you missed in SOLIDWORKS 2015 What's New Blog Series Links
Part01 – Configuration Toolbar
Part03 – Dynamic Reference Visualization
Part04 – Identify Last Saved in File Version
Part05 – View Selector Preview
Part06 – Selective Delete in Assemblies
Part07 – Equations in Assemblies
Part08 -Selecting by View
Part09 -Angle Mates
Part10 -Open Summary Report on Assembly opens
Part11 – Saving Component Instances as New Files
Part12 – CircuitWorks
Part13 – Composer 2015 SP 2.0
Part14 – Decimal Rounding
Part15 -Enhanced Angle Dimension
Part16 -Duplicate filename warnings
Part17- EPDM SNL
Part18 – Encrypted PDF SUPPORT
Part19 – SOLIDWORKS Model Based Definition
Part20 – Asymmetric Fillets
Part21 – Delete Keep Body
Part22 – Over-Run fill Pattern
Part23 – Sheet Metal
Part24 – Spline on Surface
Part25 – Weldments