diff --git a/src/PSBoardDataBase.jl b/src/PSBoardDataBase.jl
index 838b6f4..71bec98 100644
--- a/src/PSBoardDataBase.jl
+++ b/src/PSBoardDataBase.jl
@@ -14,6 +14,9 @@ include("create_table.jl")
 include("download_csv.jl")
 include("import_data.jl")
 
+include("dispatch_checker.jl")
+using .DispatchChecker
+
 """
     create_database_from_exported_csvs(
         dbpath::AbstractString;
diff --git a/src/dispatch_checker.jl b/src/dispatch_checker.jl
new file mode 100644
index 0000000..089130e
--- /dev/null
+++ b/src/dispatch_checker.jl
@@ -0,0 +1,71 @@
+module DispatchChecker
+
+using SQLite
+using DBInterface
+using DataFrames
+
+export DbConnection
+export is_dispatchable
+
+mutable struct DbConnection
+    db::SQLite.DB
+    df_single_result::DataFrame
+    df_extra_results::DataFrame
+    function DbConnection(db::SQLite.DB)
+        df_single_results =
+            DBInterface.execute(db, sql"select * from qaqc_single_run_results") |> DataFrame
+        df_extra_results =
+            DBInterface.execute(db, sql"select * from qaqc_extra_run_results") |> DataFrame
+        new(db, df_single_results, df_extra_results)
+    end
+end
+
+THRESHOLD_INSUFFICIENT_RESET_WITH_10 = 0.1
+THRESHOLD_RESET_FAILED_THOUGH_RECONFIG_DONE = 0.1
+THRESHOLD_ALWAYS_HIT_FLAG_TRUE = 0.1
+THRESHOLD_BCID_FAIL = 0.1
+
+"""
+    is_dispatchable(conn::DbConnection, psbid::Int64)
+
+Test whether the PS Board with `psbid` is dispatchable from QAQC results in `conn`.
+`conn` is type of [`DbConnection`](@ref).
+Since the current implemented logic is somewhat simple, it returns `missing` if it cannot be decided.
+"""
+function is_dispatchable(conn::DbConnection, psbid::Int64)
+    single_results = filter(:psboard_id => ==(psbid), conn.df_single_result)
+    extra_results = filter(:psboard_id => ==(psbid), conn.df_extra_results)
+
+    is_single_passed::Bool = nrow(single_results) == 1 && single_results.qaqc_result[1] == 1
+    @debug "" is_single_passed single_results
+    is_extra_passed::Bool =
+        nrow(extra_results) == 1 && let
+            extra_result = Tables.rowtable(extra_results) |> first
+            f1 =
+                extra_results.insufficient_reset_with_10 >
+                extra_results.num_tests * THRESHOLD_INSUFFICIENT_RESET_WITH_10
+            f2 =
+                extra_results.reset_failed_though_reconfig_done >
+                extra_results.num_tests * THRESHOLD_RESET_FAILED_THOUGH_RECONFIG_DONE
+            f3 =
+                extra_results.always_hit_flag_true >
+                extra_results.num_tests * THRESHOLD_ALWAYS_HIT_FLAG_TRUE
+            f4 = extra_results.bcid_fail > extra_results.num_tests * THRESHOLD_BCID_FAIL
+            f1 || f2 || f3 || f4
+        end
+    @debug "" is_extra_passed extra_results
+
+    if is_single_passed & is_extra_passed
+        return true
+    end
+
+    # TODO: not yet implemented
+    @info "results" single_results select(
+        extra_results,
+        Not(:id, :num_tests, :dac_is_0, :bcid_fail_111, :bcid_fail_000, :low_efficiency),
+    )
+    @debug "results(full)" extra_results
+    return missing
+end
+
+end # module DispatchChecker