SLOPE/W is formulated in terms of moment and force equilibrium factor of safety equations. For example, the Morgenstern-Price method satisfies both force and moment equilibrium. This general formulation makes it easy to compute the factor of safety for a variety of methods and to readily understand the relationships and differences among all the methods.

SLOPE/W can use finite element computed stresses from SIGMA/W or QUAKE/W to calculate a stability factor by computing both total shear resistance and mobilized shear stress along the entire slip surface. SLOPE/W then computes a local stability factor for each slice.

Probabilistic analysis can be performed by using normal distribution functions to vary soil properties and loading conditions. Using a Monte Carlo approach, SLOPE/W computes the probability of failure in addition to the conventional factor of safety.

• Limit equilibrium methods include Morgenstern-Price, GLE, Spencer, Bishop, Ordinary, Janbu and more.
• Soil strength models include Mohr-Coulomb, Spatial Mohr-Coulomb, Bilinear, Undrained (Phi=0), anisotropic strength, shear/normal function, and many types of strength functions.
• Specify many types of interslice shear-normal force functions.
• Pore-water pressure options include Ru coefficients, piezometric lines, pressure contours, a grid of values, spatial functions, or finite-element computed heads or pressures.
• Define potential slip surfaces by a grid of centers and radius lines, blocks of slip surface points, entry and exit ranges, fully specified shapes, or automatic.
• Use probabilistic soil properties, line loads and piezometric lines.
• And many more!

Use pore-water pressures from SEEP/W, SIGMA/W, QUAKE/W or VADOSE/W
Using finite-element computed pore-water pressures in SLOPE/W makes it possible to deal with highly irregular saturated/unsaturated conditions or transient pore-water pressure conditions in a stability analysis. For example, you can analyze changes in stability as the pore-water pressure changes with time.

Use stresses from SIGMA/W, or QUAKE/W
Using finite element computed stresses in SLOPE/W allows you to conduct a stability analysis in addition to a static deformation or dynamic earthquake analysis. For example, you can compute the minimum factor of safety that will be reached during an earthquake, or you can find the resulting permanent deformation, if any, using a Newmark-type procedure. When you purchase a SLOPE/W 2007 license you also receive a copy of the SLOPE/W Engineering Methodology book, Stability Modeling with SLOPE/W 2007. This book is not a software manual but a full-length book that discusses why and how to model. It does not describe how to use the commands in the software or which buttons to click - that is provided in detail in the Online Help. Instead it is about thinking: how to think before, during and after setting up and solving a model. The Engineering Methodology book has chapters devoted to: Preview the complete table of contents and introductory chapter. Pentium III with Microsoft Windows 2000 SP3, XP, Vista or Windows 7
  (Intel dual-core processor with 1 GB of RAM recommended)
800x600 display (1024x768 or higher is recommended)
Microsoft Internet Explorer 6 or higher
.NET 2.0 SLOPE/W 2007 ships with these items:

• A CD containing GeoStudio 2007 and Seep3D.
• A Resource CD containing tutorials and detailed example problems.
• Free Student and Viewer licenses for all software on the CD (except for Seep3D, which does not have a Student license).
• A USB or parallel port hardware key if you need one. The license file itself will be delivered electronically.
• The SLOPE/W Engineering Methodology Book.