The hardware and bandwidth for this mirror is donated by dogado GmbH, the Webhosting and Full Service-Cloud Provider. Check out our Wordpress Tutorial.
If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]dogado.de.

ISMtools

Overview

ISMtools is a comprehensive R package for Interpretive Structural Modelling (ISM) analysis. ISM is a methodology for identifying and summarizing relationships among specific elements which define an issue or problem.

The package provides:

Matrix operations: Create adjacency matrices, convert edge lists, and compute reachability matrices
Structured input support: Build adjacency matrices from SSIM (Structural Self-Interaction Matrix)
Level partitioning: Hierarchical decomposition of system elements
MICMAC analysis: Driving power and dependence analysis for factor classification
Visualization: Both static and interactive ISM structure diagrams

Installation

From CRAN (once available)

install.packages("ISMtools")

Quick Start

library(ISMtools)

# Create an adjacency matrix
adj_matrix <- matrix(c(
  0, 1, 0, 0, 0,
  0, 0, 1, 0, 0,
  0, 0, 0, 1, 1,
  0, 0, 0, 0, 0,
  0, 0, 0, 0, 0
), nrow = 5, byrow = TRUE)

# Compute reachability matrix
reach_matrix <- compute_reachability(adj_matrix)

# Perform level partitioning
levels <- level_partitioning(reach_matrix)
print(levels)

# Visualize the ISM structure
plot_ism(reach_matrix)

# Optional interactive visualization
if (requireNamespace("visNetwork", quietly = TRUE)) {
  plot_interactive_ism(reach_matrix)
}

Main Functions

Function	Description
`create_relation_matrix()`	Create or convert adjacency matrices
`convert_to_matrix()`	Convert edge lists to adjacency matrices
`compute_reachability()`	Calculate reachability matrix using Warshall’s algorithm
`level_partitioning()`	Perform hierarchical level decomposition
`plot_ism()`	Static ISM structure visualization
`plot_interactive_ism()`	Interactive ISM visualization with drag-and-drop

Example: Converting Edge List to Matrix

# From data frame
edge_df <- data.frame(
  source = c("A", "A", "B", "C"),
  target = c("B", "C", "D", "D")
)
adj_matrix <- convert_to_matrix(edge_df, from = "source", to = "target")

# From matrix edge list
edge_mat <- matrix(c("A", "B", "B", "C", "C", "D"), ncol = 2, byrow = TRUE)
adj_matrix <- convert_to_matrix(edge_mat)

Citation

If you use ISMtools in your research, please cite:

Tang Y (2026). ISMtools: Interpretive Structural Modelling Analysis Tools.

References

Warfield, J. N. (1974). Developing interconnection matrices in structural modeling. IEEE Transactions on Systems, Man, and Cybernetics, SMC-4(1), 81-87. doi:10.1109/TSMC.1974.5408524

License

MIT. See LICENSE.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.