diff --git a/src/ecss/mod.rs b/src/ecss/mod.rs
index fdc3e04..dbde721 100644
--- a/src/ecss/mod.rs
+++ b/src/ecss/mod.rs
@@ -12,6 +12,8 @@ use serde::{Deserialize, Serialize};
 #[cfg(feature = "std")]
 use std::error::Error;
 
+pub mod scheduling;
+
 pub type CrcType = u16;
 
 /// CRC algorithm used by the PUS standard.
@@ -29,6 +31,8 @@ pub enum PusServiceId {
     Event = 5,
     /// Service 8
     Action = 8,
+    /// Service 11
+    Scheduling = 11,
     /// Service 17
     Test = 17,
 }
diff --git a/src/ecss/scheduling.rs b/src/ecss/scheduling.rs
new file mode 100644
index 0000000..09cb4f6
--- /dev/null
+++ b/src/ecss/scheduling.rs
@@ -0,0 +1,91 @@
+//! PUS Service 11 Scheduling
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum Subservice {
+    // Core subservices
+    TcEnableScheduling = 1,
+    TcDisableScheduling = 2,
+    TcResetScheduling = 3,
+    TcInsertActivity = 4,
+    TcDeleteActivityByRequestId = 5,
+    TcDeleteActivitiesByFilter = 6,
+
+    // Time shift subservices
+    TcTimeShiftActivityWithRequestId = 7,
+    TcTimeShiftActivitiesByFilter = 8,
+    TcTimeShiftAll = 15,
+
+    // Reporting subservices
+    TcDetailReportByRequestId = 9,
+    TmDetailReport = 10,
+    TcDetailReportByFilter = 11,
+    TcSummaryReportByRequestId = 12,
+    TmSummaryReport = 13,
+    TcSummaryReportByFilter = 14,
+    TcDetailReportAll = 16,
+    TcSummaryReportAll = 17,
+
+    // Subschedule subservices
+    TcReportSubscheduleStatus = 18,
+    TmReportSubscheduleStatus = 19,
+    TcEnableSubschedule = 20,
+    TcDisableSubschedule = 21,
+
+    // Group subservices
+    TcCreateScheduleGroup = 22,
+    TcDeleteScheduleGroup = 23,
+    TcEnableScheduleGroup = 24,
+    TcDisableScheduleGroup = 25,
+    TcReportAllGroupsStatus = 26,
+    TmReportAllGroupsStatus = 27,
+}
+
+/// This status applies to sub-schedules and groups as well as specified in ECSS-E-ST-70-41C 8.11.3
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum SchedStatus {
+    Disabled = 0,
+    Enabled = 1,
+}
+
+impl From<bool> for SchedStatus {
+    fn from(value: bool) -> Self {
+        if value {
+            SchedStatus::Enabled
+        } else {
+            SchedStatus::Disabled
+        }
+    }
+}
+
+/// Time window types as specified in  ECSS-E-ST-70-41C 8.11.3
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum TimeWindowType {
+    SelectAll = 0,
+    TimeTagToTimeTag = 1,
+    FromTimeTag = 2,
+    ToTimeTag = 3,
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::ecss::scheduling::SchedStatus;
+
+    #[test]
+    fn test_bool_conv_0() {
+        let enabled = true;
+        let status: SchedStatus = enabled.into();
+        assert_eq!(status, SchedStatus::Enabled)
+    }
+
+    #[test]
+    fn test_bool_conv_1() {
+        let enabled = false;
+        let status: SchedStatus = enabled.into();
+        assert_eq!(status, SchedStatus::Disabled)
+    }
+}