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diff --git a/R/convergence.R b/R/convergence.R
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+#' Method to get convergence information
+#'
+#' @param object The object to investigate
+#' @param x The object to be printed
+#' @param \dots For potential future extensions
+#' @return For [mkinfit] objects, a character vector containing
+#' For [mmkin] objects, an object of class 'convergence.mmkin' with a
+#' suitable printing method.
+#' @export
+convergence <- function(object, ...)
+{
+  UseMethod("convergence", object)
+}
+
+#' @rdname convergence
+#' @export
+#' @examples
+#' \dontrun{
+#' fits <- mmkin(
+#'   c("SFO", "FOMC"),
+#'   list("FOCUS A" = FOCUS_2006_A,
+#'        "FOCUS B" = FOCUS_2006_C),
+#'   quiet = TRUE)
+#' convergence(fits)
+#' }
+convergence.mmkin <- function(object, ...) {
+  all_summary_warnings <- character()
+  sww <- 0 # Counter for Shapiro-Wilks warnings
+
+  result <- lapply(object,
+    function(fit) {
+      if (inherits(fit, "try-error")) return("E")
+      sw <- fit$summary_warnings
+      swn <- names(sw)
+      if (length(sw) > 0) {
+        if (any(grepl("S", swn))) {
+          sww <<- sww + 1
+          swn <- gsub("S", paste0("S", sww), swn)
+        }
+        warnstring <- paste(swn, collapse = ", ")
+        names(sw) <- swn
+        all_summary_warnings <<- c(all_summary_warnings, sw)
+        return(warnstring)
+      } else {
+        return("OK")
+      }
+    })
+  result <- unlist(result)
+  dim(result) <- dim(object)
+  dimnames(result) <- dimnames(object)
+
+  u_swn <- unique(names(all_summary_warnings))
+  attr(result, "unique_warnings") <- all_summary_warnings[u_swn]
+  class(result) <- "convergence.mmkin"
+  return(result)
+}
+
+#' @rdname convergence
+#' @export
+print.convergence.mmkin <- function(x, ...) {
+  u_w <- attr(x, "unique_warnings")
+  attr(x, "unique_warnings") <- NULL
+  class(x) <- NULL
+  print(x, quote = FALSE)
+  cat("\n")
+  for (i in seq_along(u_w)) {
+    cat(names(u_w)[i], ": ", u_w[i], "\n", sep = "")
+  }
+  if (any(x == "OK")) cat("OK: No warnings\n")
+  if (any(x == "E")) cat("E: Error\n")
+}