1. GTSTRUDL GTSTRUDL Upcoming Version 31 Release and Version 32 Release Dr. Kenneth M. (Mac) Will GTSUG 2010 June 2010 New Orleans, LA

2. GTSTRUDL Presentation Outline Status of Version 31 New Features in Version 31 Features planned for Version 32 Beyond Version 32

3. GTSTRUDL Status of Version 31 QA is in progress. Documentation is in progress. Plan to ship in August.

4. GTSTRUDL Version 31

5. GTSTRUDL DBX The WRITE ELEMENTS ATTRIBUTES command now reports the number of elements not included in the generated DBX file due to missing element properties. Previously, only the total number of complete element attributes written was reported.

6. GTSTRUDL Dynamics The LIST DYNAMIC PARTICIPATION FACTORS Command was given the ability to output the mass participation factors in a tabulated form sorted by mode, by one of the global directions, or by each one of the global directions. By default, the output will only show active modes. However, the user can specify if the output should include all modes. The command can also output only totals in each global direction.

7. GTSTRUDL Dynamics (cont) The ACTIVE/INACTIVE MODES Command has been enhanced to automatically Activate/Inactivate modes according to minimum target of mass participation factors given for each global direction. An example of the enhanced LIST DYNAMIC PARTICIPATION FACTOR AND INACTIVE MODE commands is shown on the next slide.

8. GTSTRUDL

9. General (cont) The efficiency of the LIST MAXIMUM JOINT DISPLACEMENTS and LIST MAXIMUM REACTIONS commands has been dramatically improved when the analysis results are stored on external save files using the GTSES/GT64M sparse equation solvers. For jobs consisting of large models with tens and even hundreds of loading conditions, the time to execute these commands has decreased from an hour or more for the largest jobs to a few minutes at most.

10. GTSTRUDL General (continued) The MATERIAL command now respects the EXISTING MEMBERS ONLY and the EXISTING ELEMENTS ONLY options for a member list. Previously, the ONLY specification was ignored and the material properties (E, DENSITY, etc.) were assigned to all members and elements in the EXISTING list. Example: MATERIAL CONCRETE ELEMENTS EXISTING - ELEMENTS ONLY

11. GTSTRUDL General (continued) The EXISTING option for lists now works with load names. Previously, only LOAD LIST would recognize EXISTING, although the options of BUT and PLUS were not recognized, but no other load name list recognized the EXISTING option. Example: PRINT LOAD DATA LOADS EXISTING BUT 100

12. GTSTRUDL General (continued) The CALCULATE PRESSURE command has been improved by the addition of support for analysis results stored in files, created by the execution of linear and nonlinear static analyses using the GTSES/GT64M sparse equation solvers. The COUTPUT command will now assume COUTPUT standard if an invalid file name is specified. An invalid file name can be due to illegal characters in the name, or restrictive permissions on the folder where the file is attempting to open.

13. GTSTRUDL GTMenu The Split Member option now allows a member list to be built using all settings in the Mode Bar. Previously, only the Hit and List modes were available. When entering GTMenu, the structure is now drawn only once. For large models, multiple draws slowed down the entry into GTMenu. A Current Group must now be selected before Current Group options are made active.

14. GTSTRUDL GTMenu (continued) A message is now given when Check Model results are written to a file. The efficiency of Color by Section has been improved for large models. The cursor now displays as an hourglass when the structure is being redrawn.

15. GTSTRUDL GTMenu (continued) When entering GTMenu from command mode with members which have pipe properties, the property group for a pipe section is now named according to the PIPE dimensions: Outer Diameter x THIckness. The name is generated in inches if the units are English, and the name is generated in millimeters if the units are Metric. Also, for the Display Model Section Names, a pipe descriptor will be used such as 660x25 for a pipe with a 660 mm OD and a 25 mm wall thickness. The Display Model Color by Section will use the same descriptor. Examples on next slides.

16. GTSTRUDL Display Model Section Names for Pipes

17. GTSTRUDL Display Model Color by Section with Section Names for Pipes

18. GTSTRUDL GTMenu (continued) The Color by Section Legends (both the scrolling box and the graphics screen legend) have been enhanced to fully display the specifications of a variable section: that is, the length and type of each segment (in current units where applicable) are given. An example of an offshore structure is shown on the next slide.

19. GTSTRUDL Sample Property Legend for Variable Members

20. GTSTRUDL GTSTRUDL Output Window The Deletions dialog (Modeling – Data Management – Deletions) has been expanded to include data for finite elements and groups.

21. GTSTRUDL Output Window (cont) In the Area Load dialog, Individual buttons for ‘One way X’ and ‘One way Z’ have been added. The Custom option is the old method, where the user was required to enter at least one value in the X or Z box.

22. GTSTRUDL Output Window (cont) The 'All' option has been removed from the File -> Save menu. The 'All' option activated the first three Save options only, which was confusing to some users. Now, click on each option separately if more than one type of Save is desired.

23. GTSTRUDL Output Window (cont) In the Command window (Text Mode), when the Paste buffer is more than 10 lines, only the first 10 lines of the buffer are displayed for verification. Previously, all lines in the Paste buffer were displayed, which could result in a dialog where the Yes and No buttons were off the screen for very large Paste buffers.

24. GTSTRUDL Output Window (cont) Example of pasting input into GTSTRUDL Output Window

25. GTSTRUDL Model Wizard The Continuous Beam Wizard has been enhanced to include a Moving Load page and an Automatic Load Combination page. In addition, the default support condition at X = 0.0 will be pinned, instead of fixed. Examples of the new dialogs are shown on the next slide.

26. GTSTRUDL Model Wizard (cont) New Moving Load dialog New Moving Load Combination dialog

27. GTSTRUDL Model Wizard (cont) The Vault/Rectangular Tank Wizard now includes the option to add a top as shown in the dialog below and on the next slide.

28. GTSTRUDL Model Wizard (cont)

29. GTSTRUDL Model Wizard (cont) You can now add pressure to the top and the sides of the tank using the new dialog shown. The side pressure allows you to model a surcharge loading.

30. GTSTRUDL Model Wizard (cont) The Plane Frame Wizard now includes new bracing types: –Inverted Chevron Braces with offsets and eccentricities –Left and right Diagonal braces with eccentricities –Knee braces Examples of these new bracing types are shown on the next slides

31. GTSTRUDL Model Wizard (cont) New Bracing dialog

32. GTSTRUDL Chevron Centered Chevron Eccentric Chevron Inverted and Eccentric

33. GTSTRUDL Chevron Inverted and Offset Chevron with OffsetDiagonal with Left Eccentric

34. GTSTRUDL Knee Braces Model with Mixed Bracing Types

35. GTSTRUDL Model Wizard (cont) Different properties can be specified for link beams

36. GTSTRUDL Model Wizard (cont) Variable bracing can be specified by bay

37. GTSTRUDL Model Wizard (cont) The Model Wizard now adds SET ELEMENTS HASHED to all models with more than 300 joints. Previously, only the Vault and Space Frame Wizards added this command. SET ELEMENTS HASHED speeds up the processing of commands for large input files.

38. GTSTRUDL Nonlinear Support for nonlinear geometric behavior has been implemented for the SBHQ, SBHQ6, SBHT, and SBHT6 plate finite elements. The nonlinear geometric behavior capability is designated for these elements by the NONLINEAR EFFECTS command in a manner identical to way it is done for frame and truss members. This capability is only available for the GTSES solver option.

39. GTSTRUDL Nonlinear (cont) An example of accounting for the geometric nonlinear behavior using these elements in a pushover analysis on a square simply supported plate with a uniform load is shown below: Nonlinear Effects Geometry elements 1 to 144 End Active Solver GTSES An example of a simply supported plate and its response are shown on the next slide

40. GTSTRUDL Nonlinear (cont) Simply supported plate with uniform pressure Plot of Pushover Analysis Results Nonlinear vertical displacement at center

41. GTSTRUDL Nonlinear (cont) Nonlinear analysis has been extended to support the GTSES sparse equation solver. The GTSES solver is executed for nonlinear static analysis when the NONLINEAR ANALYSIS GTSES command is given or when the ACTIVE SOLVER GTSES command is given prior to any NONLINEAR ANALYSIS commands. When nonlinear analysis uses the GTSES solver, it also stores the analysis results into files, rather than in memory. The GTSES solver in conjunction with the storage of results in files provide nonlinear static analysis with the ability to solve significantly larger problems with much greater speed and efficiency. An example of the performance improvement using the GTSES solver is shown on the next slide

42. GTSTRUDL Nonlinear (cont) Industrial Building Model # of joints=2900 # of members=6300 # of active loads = 73 # of DOFs= 18000 Time for nonlinear analysis, GTSES = 14.0 min. Time for nonlinear analysis, Standard (V30)= 240.0 min. Average Time/Loading, GTSES = 11.5 sec. Average Time/Loading, Standard (V30) =197.0 sec.

43. GTSTRUDL Nonlinear (cont) The PERFORM PUSHOVER ANALYSIS command has been enhanced with the addition of the GTSES option, which indicates that the GTSES sparse equation solver shall be used for the execution of the nonlinear analysis steps of the pushover analysis procedure. The PERFORM PUSHOVER ANALYSIS command also uses the GTSES solver when the ACTIVE SOLVER GTSES command is given prior to the PERFORM PUSHOVER ANALYSIS command.

44. GTSTRUDL Nonlinear (cont) The PERFORM CABLE PRESTRESS ANALYSIS command has been enhanced with the addition of the GTSES option, which indicates that the GTSES sparse equation solver shall be used for the execution of the nonlinear analysis steps of the cable prestress analysis procedure. The PERFORM CABLE PRESTRESS ANALYSIS command also uses the GTSES solver when the ACTIVE SOLVER GTSES command is given prior to the PERFORM CABLE PRESTRESS ANALYSIS command.

45. GTSTRUDL Offshore A new API Recommended Practice 2A- WSD (RP 2A-WSD), Twenty-First Edition steel design code for Basic and Hydrostatic Pressure stresses check has been implemented as a prerelease feature. This new code, APIWSD21, may be used to select or check Circular Hollow Sections (Pipes).

46. GTSTRUDL Offshore (cont) A new API Recommended Practice 2A- WSD (RP 2A-WSD), Twenty-First Edition steel design code for Punching Shear check has been implemented as a prerelease feature. This new code, APIWSD21, may be used to check or design Circular Hollow Sections (Pipes).

47. GTSTRUDL Reinforced Concrete The ACI 318-05 reinforced concrete code has been added. The command format is METHOD ACI 318-05 (SEISMIC) The ACI 318-05 code support all options included with 318-89 including special moment frame detailing according to Chapter 21 if requested.

48. GTSTRUDL Steel Design The steel design code AISC13, which is based on the Steel Construction Manual AISC Thirteenth Edition, is moved to release status. The AISC13 code utilizes the Load and Resistance Factor Design (LRFD) techniques of the AISC Specification and also the safety factor Ω has been implemented for the Allowable Strength Design (ASD).A summary of the features are shown on the next slide.

49. GTSTRUDL Steel Design (cont) The AISC13 code of GTSTRUDL may be used to select or check any of the following shapes: Design for bi-axial bending and axial forces: I shapes Channels Tees Single Angles Double Angles Square Bars Round Bars Rectangular Bars Design for bi-axial bending, axial, and torsional forces: Round HSS (Pipes) Rectangular and Square HSS (Structural Tubes)

50. GTSTRUDL Steel Design (cont) A new ANSI/AISC N690, American National Standard Specification for the Design, Fabrication, and Erection of Steel Safety-Related Structures for Nuclear Facilities, 1994 Edition, has been implemented as a released feature. This new code, N690-94, may be used to select or check any of the shapes on the next slide.

51. GTSTRUDL Steel Design (cont) Design for axial force and bi-axial bending: I shapes Channels Single Angles Tees Double Angles Round Bars Pipes Square and Rectangular Bars Structural Tubing

52. GTSTRUDL Steel Design (cont) New ASME, Boiler and Pressure Vessel Code, Section III, Rules for Construction of Nuclear Power Plant Components. Division I - Subsection NF Component Supports, 2004 and 2007 Editions with their respective addenda, have been implemented as released features. These new codes, NF-2004 and NF-2007, may be used to select or check any of the shapes on the next slide.

53. GTSTRUDL Steel Design (cont) Design for axial force and bi-axial bending: I shapes Channels Single Angles Tees Double Angles Round Bars Pipes Square and Rectangular Bars Structural Tubing

54. GTSTRUDL Steel Design (cont) Results of a steel code check or select using the MAXIMUM ENVELOPE option of the CHECK and SELECT commands are now available in the code check results datasheet, the view code check results in GTMenu, and the LIST CODE CHECK RESULTS command.

55. GTSTRUDL Steel Design (cont) A new feature has been added to the steel design CHECK and SELECT commands to check the user specified parameters to see if they are valid for the requested design code (i.e., AISC13, ASD9, EC3-2005, N690-94, NF-2007, etc.). This new feature has been implemented due to anticipating that a user may take an existing model based on the ASD9 code and now modifying the model to perform a code check based on the AISC13 code. This new feature starts checking user specified parameters for the requested code at the beginning of the CHECK or SELECT command. If there is any user specified parameters that do not apply to the specified design code, a warning message with a list of parameters that are not applicable is printed.

56. GTSTRUDL Steel Design (cont) A new Eurocode 3, EN 1993-1-1: 2005 (E) steel design code has been implemented as a prerelease feature. This new code, EC3- 2005, may be used to select or check any of the following shapes:

57. GTSTRUDL Steel Design (cont) Design for axial force and bi-axial bending: I shapes Circular Hollow Sections (Pipes) Rectangular Hollow Sections (Structural Tube) Solid Round Bars Design for axial force only: Single Angles Double Angles

58. GTSTRUDL Steel Tables and GTTABLE New Metric Tables from AISC Thirteenth Edition have been added to GTSTRUDL. The GTTABLE commands have been modified to accept long profile names. Also, the GTTABLE output has been modified to display both long and short profile names.

59. GTSTRUDL Utility Programs GTS2ACAD (GTSTRUDL to AutoCAD) has been upgraded to version 4.2. Two- dimensional elements with mid-side nodes are now processed. Elements with mid-side nodes now processed are: Triangles: LST, UTLQ1 Quads: IPQQ, IPCQ, IPQLQ1, IPQLQ2, IPQLQ2B, IPQLQ3, IPQLQ4, IPBQQ

60. GTSTRUDL Base Plate Metric units “Millimeters” has been added to the Plate tab. Attachment placement offset can now be specified from the plate origin as well as the plate center in the Attachment dialog.

61. GTSTRUDL Base Plate (cont) Attachments modeled as FE extensions may be loaded at the extension end or at the plate surface. This is done in the Add Attachment dialog.

62. GTSTRUDL Base Plate (cont) Comments in the generated.gti file have been expanded. The BPW now prompts to save a.gtbp file if changes to the plate have been made. Current unit display has been added to dialogs that previously only had a bare edit box. Current units display has also been added to the results datasheets.

63. GTSTRUDL Base Plate (cont) The AISC 9 th Edition metric profile names have been added as available attachments. When a.gtbp is read or saved, its name is added to the BPW window title and the file name is used as the default.gti file in the GTSTRUDL Input File options dialog.

64. GTSTRUDL Base Plate (cont) A ‘Print load data’ option has been added to the Results Summary dialog. A ‘Write to File’ option has been added to the individual result datasheets.

65. GTSTRUDL Base Plate (cont) Plate stresses now include principle stresses S1, S2, Tmax and the Von Mises criteria. Also, sorting options have been added to the Plate Stress datasheet.

66. GTSTRUDL Base Plate (cont) The Anchor Results datasheet now includes options to organize anchor results by anchor or by load. Results ordered by Anchor Results ordered by Load

67. GTSTRUDL Base Plate (cont) The Plate Displacements datasheet now offers two sorting options, by ‘Lift off’ (+Z displacement) or by ‘Depress’ (-Z displacement).

68. GTSTRUDL Version 32

69. GTSTRUDL Version 32 – Base Plate Add ANCHOR commands to BASE Plate module. – modeling and capacity check by ACI 318-05. Commands can be user created or by the Base Plate Wizard.

70. GTSTRUDL Version 32- DBX Add WRITE CODE CHECK RESULTS.

71. GTSTRUDL Version 32- Dynamic Analysis Implement the GT64M Lanczos eigenvalue analysis method, which is a 64-bit, high-performance sparse equation solution method. Implement a GTSES version of linear direct integration (physical) transient analysis. Computation of minimum seismic load according to latest IBC provisions.

72. GTSTRUDL Version 32- Finite Elements A new eight node solid element with incompatible modes will be implemented. This element will offer substantially improved accuracy over the existing eight node solid element for structures with bending and shear deformation. The element will include all of the features currently available with the current eight node solid (IPSL) element.

73. GTSTRUDL Version 32- Finite Elements (cont) New eight node moderately thick six degree of freedom flat plate element with the following capabilities: –Surface, temperature, and body forces –Lumped and Consistent Mass matrix for dynamic analysis –Geometric stiffness for linear buckling analysis –Standard finite element output – LIST, CALCULATE AVERAGE –Integration into GTMenu (geometry, loads, input file, contour results)

74. GTSTRUDL Version 32- Finite Elements (cont) Implement local element coordinate system results processing (text reports and graphical display of stress contours) for selected planar elements, in particular the SBHQ and SBHT family of plate elements. This is particularly convenient and useful for structures formed by surfaces of revolution.

75. GTSTRUDL Version 32- General Add command to PRINT BETA ANGLES list (in addition to the current PRINT MEMBER CONSTANTS command). Add sorting and limits to LIST CODE CHECK RESULTS PRINT JOINT CONNECTIVITY and form a Group of the members and elements incident on joints in a list. PRINT INCIDENT JOINTS MEMBERS/ELEMENTS command to print the joints incident to a list and create a GROUP. When second and subsequent JOINT LOADS are applied to a joint in a loading condition, the WARNING will change to INFO.

76. GTSTRUDL Version 32- General (cont) LOCATE FLOATING JOINTS ( (AND) -REMOVE ) Only joints that are not attached to any member, finite element, nonlinear spring or rigid body will be considered as possible “floating” joints. If a joint is used as a BETA REFERENCE JOINT it will not be considered “floating”. LOCATE DUPLICATE ELEMENTS ( (AND) REMOVE (ADD LOADS) ). Similar to LOCATE DUPLICATE MEMBERS. LOCATE INTERSECTING MEMBERS list TOL v Detect members within a tolerance (TOL) of each other to locate “crossing” members that may look correct graphically but should actually have a common joint at their intersection. Add finite elements to LOCATE INTERFERENCE JOINTS.

77. GTSTRUDL Version 32- General (cont) Add the ability to write or change support status as part of the CALCULATE SOIL SPRINGS command. Currently, user must have already specified joints as supports and joint releases. The AASHTO HL-93 truck will be added to the Moving Load Generator. Add additional cross sections to the MEMBER PROPERTIES command similar to the I-Shape and Pipe cross sections for Tubes, Channels,…etc. A new option will be added to the PRINT MEMBER PROPERTIES command to print all cross-sectional property information.

78. GTSTRUDL Version 32 - General (cont) AREA LOAD enhancements Check for interference joints and intersecting members in plane before attempting to locate bounded areas. Improve error reporting: List of 0.0 length members Start joint for "illegal configuration" to help with debugging. Add IGNORE NONORTHOGONAL MEMBERS option. Ignore members not within specified angle of global axis so bracing doesn’t need to be inactivated. PLOT option - create a Scope Editor file like the dialog display with shaded bounded areas.

79. GTSTRUDL Version 32 - GTMenu Add Undo to remove duplicate joints dialog to avoid corrupting model due to using a tolerance which was too large. Add the ability to automatically split members which are in the model when the finite element mesh is refined. The new dialog is shown on the next slide.

80. GTSTRUDL New option to split members while refining FE mesh

81. GTSTRUDL Version 32 – GTMenu (cont) Display additional steel design parameters: LX, FRLX, FRLY, FRLZ, FRUNLCF, TBLNAM, Yield Strength, Tensile Strength New dialog is shown on next slide.

82. GTSTRUDL Additions to Display Paramters Dialog

83. GTSTRUDL Version 32 – GTMenu (cont) Implement automatic mesh algorithm for 2D elements to mesh structure using only structure outline including internal boundaries and line constraints. The new meshing dialog is shown on the next slide with several examples on subsequent slides.

84. GTSTRUDL New Meshing Dialog Define External Boundaries Define Internal Openings Define Constraint Lines Set the Mesh Size

85. GTSTRUDL Model with External Boundaries and Internal Constraint Line (Uses Construction Points and Lines)

86. GTSTRUDL Resulting Mesh Constraint Line

87. GTSTRUDL Model with External and Internal Boundary (uses Constructions Points and Lines

88. GTSTRUDL Resulting Mesh

89. GTSTRUDL Version 32 – GTMenu (cont) Redraw solid will display the nine Unistrut sections in the GTSTRUDL Unistrut table as shown on the next slide

90. GTSTRUDL

91. Version 32 – GTMenu (cont) Ability to click on a member and have a graphical summary of the results on just that member in a separate Window that can be printed.

92. GTSTRUDL Version 32 – GTMenu (cont) A new Property Group can be added when you are creating members. Finite elements will be labeled closer to their centroid. Label duplicate joints, members, or elements on screen. Label floating joints on screen.

93. GTSTRUDL Version 32 – GTMenu (cont) The user will be able to change the colors used for contour plots. Different colors can be used for members and finite elements for the deformed structure, mode shapes and transient animation as shown on next slide. Change colors for contouring

94. GTSTRUDL Different colors for members and elements in Deformed Structure, Mode Shape, and Transient Animation displays You may also change the color used for annotation (labels and legends)

95. GTSTRUDL Version 32 – GTMenu (cont) Dynamic mass specified using the INERTIA OF JOINTS command can be displayed. Example on next slide

96. GTSTRUDL Dynamic mass from Inertia of Joints from Load command

97. GTSTRUDL Version 32 – GTMenu (cont) New Mode Bar selection called Rect(angular) Fence which allows you to select entities within the rectangular fence

98. GTSTRUDL Rectangular Fence

99. GTSTRUDL Version 32 GTSTRUDL Output Window Track Warning messages like Error messages. Pop-up a dialog with Error and Warning count. List Error or Warning output lines in a dialog, click on an Error or Warning and the output cursor moves to that line in the output listing.

100. GTSTRUDL Version 32– Nonlinear Analysis The nonlinear member end connection and plastic hinge models will be supported by nonlinear dynamic analysis. Add nonlinear viscous damper element for nonlinear dynamic analysis

101. GTSTRUDL Version 32 – Offshore Move API 2A-WSD 21 st edition code to release status. Implement ISO 19902:2007(E), International Standard for Petroleum and Natural Gas Industries – Fixed Steel Offshore Structures. Implement fatigue analysis based on transient analysis results.

102. GTSTRUDL Version 32- Reinforced Concrete The ACI 318-08 code will be implemented for beam and column design. The DESIGN SLAB command will be brought to release status.

103. GTSTRUDL Version 32 - Steel Design Move Eurocode EC3- 2005 code to release status. Add new parameter called ‘DesLoads’ which can be used to specify design loads. Add an option to create a group containing the critical loads at the end of a CHECK or SELECT command.

104. GTSTRUDL Version 32 New Features – Steel Design Add a new option to the CHECK and SELECT commands to print the load names and section location used for the code check. Displacement Constraint Design Procedure will be available to select members to satisfy joint displacement constraints. The new GTSES external file solver will be added as an option.

105. GTSTRUDL Interfaces to Other Programs AutoCAD – interface via DXF converter Intergraph’s Frameworks Intergraph’s SmartPlant 3D – CIS/2 Structural Desktop by Structural Desktop, Inc Tekla Structures New interface under development with our agent in Europe Other CAD programs which support DXF or CIS/2

106. GTSTRUDL Beyond 32

107. GTSTRUDL Future Enhancements Multiple windows to allow for result display in a separate window than the model display. Graphically specify joints and elements in GTMenu to be used to obtain output from the LIST SUM FORCES capability. Graphically specify Area Loads in GTMenu.

108. GTSTRUDL Future Enhancements (cont) Addition of the following items to the input file created by GTMenu: –Dynamic Loadings –Eigen Parameters –Dynamic Modal Damping Data –Nonlinear Effects –Nonlinear Spring Properties –Nonlinear Solution Parameters –Cable Network Data

109. GTSTRUDL Future Enhancements (cont) Implement AISC 2010 steel design code with new tables. Implement AISC 2010 seismic provisions. Develop complete 64 bit version of GTSTRUDL.

110. GTSTRUDL Your assistance is needed to help us improve GTSTRUDL in your Committee meetings : Please provide us with a prioritized list of the features that you would like to see. Please be specific especially when requesting model wizard, design codes (which codes and which cross sections) or datasheet requests. Sketches of wizards, output, and graphical displays help us tremendously as evidenced by the recent enhancements to the Model Wizard which are a result of input from the User Interface Committee.