diff --git a/lib/php-analyzer.sh b/lib/php-analyzer.sh
index 3d98bd6..0602047 100644
--- a/lib/php-analyzer.sh
+++ b/lib/php-analyzer.sh
@@ -135,7 +135,8 @@ analyze_slow_requests() {
                             total_count=$((total_count + 1))
 
                             # Track slowest occurrence per script
-                            if [ -z "${slow_scripts[$script]}" ] || (( $(echo "${slow_scripts[$script]} < $duration" | bc -l) )); then
+                            local is_slower=$(awk "BEGIN {print (${slow_scripts[$script]:-0} < $duration ? 1 : 0)}" 2>/dev/null || echo 1)
+                            if [ -z "${slow_scripts[$script]}" ] || [ "$is_slower" -eq 1 ]; then
                                 slow_scripts[$script]="$duration"
                             fi
                         fi
@@ -387,12 +388,15 @@ analyze_opcache_effectiveness() {
 
     # Generate recommendation
     local recommendation=""
+    local hit_rate_low=$(awk "BEGIN {print ($hit_rate < 90 ? 1 : 0)}" 2>/dev/null || echo 0)
+    local wasted_high=$(awk "BEGIN {print ($wasted > 5 ? 1 : 0)}" 2>/dev/null || echo 0)
+    local cached_high=$(awk "BEGIN {print ($cached_scripts > $max_cached * 0.8 ? 1 : 0)}" 2>/dev/null || echo 0)
 
-    if (( $(echo "$hit_rate < 90" | bc -l) )); then
+    if [ "$hit_rate_low" -eq 1 ]; then
         recommendation="Hit rate below 90% - Increase opcache.memory_consumption"
-    elif (( $(echo "$wasted > 5" | bc -l) )); then
+    elif [ "$wasted_high" -eq 1 ]; then
         recommendation="High wasted memory (${wasted}MB) - Consider increasing opcache.max_accelerated_files"
-    elif (( $(echo "$cached_scripts > $max_cached * 0.8" | bc -l) )); then
+    elif [ "$cached_high" -eq 1 ]; then
         recommendation="Cached scripts at 80% capacity - Increase opcache.max_accelerated_files"
     else
         recommendation="OPcache performing optimally"
@@ -476,8 +480,11 @@ detect_php_config_issues() {
 
     if [ "$status" = "DISABLED" ]; then
         issues+="PERFORMANCE|HIGH|OPcache is disabled|Enable OPcache for 40-70% performance improvement"$'\n'
-    elif (( $(echo "$hit_rate < 90" | bc -l) )); then
-        issues+="PERFORMANCE|MEDIUM|OPcache hit rate is low (${hit_rate}%)|Increase opcache.memory_consumption"$'\n'
+    else
+        local hit_rate_low=$(awk "BEGIN {print ($hit_rate < 90 ? 1 : 0)}" 2>/dev/null || echo 0)
+        if [ "$hit_rate_low" -eq 1 ]; then
+            issues+="PERFORMANCE|MEDIUM|OPcache hit rate is low (${hit_rate}%)|Increase opcache.memory_consumption"$'\n'
+        fi
     fi
 
     # ISSUE 7: Check FPM pool configuration
diff --git a/lib/reference-db.sh b/lib/reference-db.sh
index 31a6c51..6249b3c 100755
--- a/lib/reference-db.sh
+++ b/lib/reference-db.sh
@@ -551,7 +551,7 @@ db_is_system_under_load() {
 
     # Consider system under load if CPU > 80% or memory > 90%
     if [ -n "$cpu_load" ] && [ -n "$cpu_cores" ]; then
-        local load_percent=$(echo "scale=0; ($cpu_load / $cpu_cores) * 100" | bc 2>/dev/null || echo "0")
+        local load_percent=$(awk "BEGIN {printf \"%.0f\", ($cpu_load / $cpu_cores) * 100}" 2>/dev/null || echo "0")
         if [ "$load_percent" -gt 80 ] || [ "${mem_percent:-0}" -gt 90 ]; then
             return 0  # True - system is under load
         fi
@@ -567,7 +567,8 @@ db_has_network_issues() {
 
     # Consider network problematic if retrans > 5% or errors > 100
     if [ -n "$tcp_retrans" ]; then
-        if (( $(echo "$tcp_retrans > 5" | bc -l 2>/dev/null || echo 0) )) || \
+        local retrans_high=$(awk "BEGIN {print ($tcp_retrans > 5 ? 1 : 0)}" 2>/dev/null || echo 0)
+        if [ "$retrans_high" -eq 1 ] || \
            [ "${rx_errors:-0}" -gt 100 ] || [ "${tx_errors:-0}" -gt 100 ]; then
             return 0  # True - network has issues
         fi
diff --git a/lib/threat-intelligence.sh b/lib/threat-intelligence.sh
index fef565b..98158c2 100644
--- a/lib/threat-intelligence.sh
+++ b/lib/threat-intelligence.sh
@@ -307,7 +307,7 @@ is_server_stressed() {
     load1=$(echo "$load1" | awk '{print $1}')
 
     # Convert to integer (multiply by 100 to handle decimals)
-    local load_int=$(echo "$load1 * 100" | bc 2>/dev/null | cut -d. -f1)
+    local load_int=$(awk "BEGIN {printf \"%.0f\", $load1 * 100}" 2>/dev/null)
     local threshold=$((cpu_count * 80))  # 80% of CPU count
 
     if [ "$load_int" -gt "$threshold" ]; then
diff --git a/modules/diagnostics/system-health-check.sh b/modules/diagnostics/system-health-check.sh
index e946c63..c0e0c77 100755
--- a/modules/diagnostics/system-health-check.sh
+++ b/modules/diagnostics/system-health-check.sh
@@ -342,25 +342,32 @@ analyze_cpu() {
     local load_15min=$(uptime | awk -F'load average:' '{print $2}' | awk -F',' '{print $3}' | xargs)
 
     # Calculate load per core
-    local load_per_core=$(echo "$load_1min / $cpu_cores" | bc -l 2>/dev/null | awk '{printf "%.2f", $0}' || echo "0")
+    local load_per_core=$(awk "BEGIN {printf \"%.2f\", $load_1min / $cpu_cores}" 2>/dev/null || echo "0")
 
     # Calculate healthy load thresholds
-    local healthy_load=$(echo "$cpu_cores * 0.7" | bc -l | awk '{printf "%.1f", $0}')
-    local warning_load=$(echo "$cpu_cores * 1.0" | bc -l | awk '{printf "%.1f", $0}')
-    local critical_load=$(echo "$cpu_cores * 2.0" | bc -l | awk '{printf "%.1f", $0}')
+    local healthy_load=$(awk "BEGIN {printf \"%.1f\", $cpu_cores * 0.7}")
+    local warning_load=$(awk "BEGIN {printf \"%.1f\", $cpu_cores * 1.0}")
+    local critical_load=$(awk "BEGIN {printf \"%.1f\", $cpu_cores * 2.0}")
 
     # Detect load trend (increasing, stable, decreasing)
     local load_trend="stable"
-    if (( $(echo "$load_1min > $load_5min * 1.2" | bc -l) )); then
+    local trend_rapid=$(awk "BEGIN {print ($load_1min > $load_5min * 1.2 ? 1 : 0)}" 2>/dev/null || echo 0)
+    local trend_up=$(awk "BEGIN {print ($load_1min > $load_5min ? 1 : 0)}" 2>/dev/null || echo 0)
+    local trend_down=$(awk "BEGIN {print ($load_1min < $load_5min * 0.8 ? 1 : 0)}" 2>/dev/null || echo 0)
+
+    if [ "$trend_rapid" -eq 1 ]; then
         load_trend="increasing rapidly"
-    elif (( $(echo "$load_1min > $load_5min" | bc -l) )); then
+    elif [ "$trend_up" -eq 1 ]; then
         load_trend="increasing"
-    elif (( $(echo "$load_1min < $load_5min * 0.8" | bc -l) )); then
+    elif [ "$trend_down" -eq 1 ]; then
         load_trend="decreasing"
     fi
 
     # Check load average with intelligent thresholds
-    if (( $(echo "$load_1min > $critical_load" | bc -l) )); then
+    local load_critical=$(awk "BEGIN {print ($load_1min > $critical_load ? 1 : 0)}" 2>/dev/null || echo 0)
+    local load_warning=$(awk "BEGIN {print ($load_1min > $warning_load ? 1 : 0)}" 2>/dev/null || echo 0)
+
+    if [ "$load_critical" -eq 1 ]; then
         local top_cpu=$(ps aux --sort=-%cpu | head -6 | tail -5 | awk '{printf "  • %-15s %6s %s\n", $1, $3"%", $11}')
         add_issue "CRITICAL" "CPU - Extreme load" \
             "Load average: ${load_1min} / ${load_5min} / ${load_15min}
@@ -379,7 +386,7 @@ ${top_cpu}" \
   2. Kill if necessary: kill -9 [PID]
   3. Check if under attack: Main Menu → Security → Bot Analyzer" \
             92
-    elif (( $(echo "$load_1min > $warning_load" | bc -l) )); then
+    elif [ "$load_warning" -eq 1 ]; then
         local top_cpu=$(ps aux --sort=-%cpu | head -4 | tail -3 | awk '{printf "  • %-15s %6s %s\n", $1, $3"%", $11}')
         add_issue "HIGH" "CPU - High load" \
             "Load average: ${load_1min} / ${load_5min} / ${load_15min}
@@ -396,13 +403,16 @@ ${top_cpu}" \
   • Check: ps aux --sort=-%cpu | head -20
   • Review high-CPU processes and optimize if possible" \
             76
-    elif (( $(echo "$load_1min > $healthy_load" | bc -l) )); then
-        add_issue "MEDIUM" "CPU - Elevated load" \
-            "Load average: ${load_1min} / ${load_5min} / ${load_15min}
+    else
+        local load_elevated=$(awk "BEGIN {print ($load_1min > $healthy_load ? 1 : 0)}" 2>/dev/null || echo 0)
+        if [ "$load_elevated" -eq 1 ]; then
+            add_issue "MEDIUM" "CPU - Elevated load" \
+                "Load average: ${load_1min} / ${load_5min} / ${load_15min}
 Healthy threshold: < ${healthy_load}
 Trend: ${load_trend}" \
-            "Monitor trends. Load is elevated but not critical yet." \
-            62
+                "Monitor trends. Load is elevated but not critical yet." \
+                62
+        fi
     fi
 
     # Get top CPU consumers
@@ -818,8 +828,9 @@ New connections may be dropped" \
     tcp_out=$(echo "$tcp_out" | tr -d '\n\r' | grep -o '[0-9]*' | head -1)
     tcp_out=${tcp_out:-1}
     if [ "$tcp_out" -gt 1000000 ] 2>/dev/null; then
-        local retrans_percent=$(echo "scale=2; $tcp_retrans * 100 / $tcp_out" | bc 2>/dev/null || echo "0")
-        if (( $(echo "$retrans_percent > 5" | bc -l 2>/dev/null) )); then
+        local retrans_percent=$(awk "BEGIN {printf \"%.2f\", $tcp_retrans * 100 / $tcp_out}" 2>/dev/null || echo "0")
+        local retrans_high=$(awk "BEGIN {print ($retrans_percent > 5 ? 1 : 0)}" 2>/dev/null || echo 0)
+        if [ "$retrans_high" -eq 1 ]; then
             # Get current MTU
             local current_mtu=$(ip link show $(ip route | grep default | awk '{print $5}' | head -1) 2>/dev/null | grep mtu | awk '{print $5}')
 
@@ -891,7 +902,8 @@ Time drift can cause SSL certificate errors and authentication issues" \
             # Convert to absolute value for comparison
             offset_seconds=${offset_seconds#-}
 
-            if (( $(echo "$offset_seconds > 1" | bc -l 2>/dev/null || echo "0") )); then
+            local offset_high=$(awk "BEGIN {print ($offset_seconds > 1 ? 1 : 0)}" 2>/dev/null || echo 0)
+            if [ "$offset_high" -eq 1 ]; then
                 add_issue "HIGH" "TIME - Clock offset detected" \
                     "Time offset: ${sync_status}
 Significant time drift detected" \
@@ -1682,7 +1694,7 @@ save_health_baseline() {
     tcp_out=${tcp_out:-1}
     local tcp_retrans_percent="0"
     if [ "$tcp_out" -gt 1000000 ] 2>/dev/null; then
-        tcp_retrans_percent=$(echo "scale=2; $tcp_retrans * 100 / $tcp_out" | bc 2>/dev/null || echo "0")
+        tcp_retrans_percent=$(awk "BEGIN {printf \"%.2f\", $tcp_retrans * 100 / $tcp_out}" 2>/dev/null || echo "0")
     fi
 
     local rx_errors=0
diff --git a/modules/performance/hardware-health-check.sh b/modules/performance/hardware-health-check.sh
index 304c03b..726d2c8 100755
--- a/modules/performance/hardware-health-check.sh
+++ b/modules/performance/hardware-health-check.sh
@@ -261,7 +261,7 @@ check_cpu_health() {
     local cpu_freq=""
     if [ -f "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq" ]; then
         local freq_khz=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)
-        cpu_freq=$(echo "scale=2; $freq_khz / 1000000" | bc)" GHz"
+        cpu_freq=$(awk "BEGIN {printf \"%.2f\", $freq_khz / 1000000}")" GHz"
     fi
 
     # Check CPU temperature if sensors available
diff --git a/modules/performance/network-bandwidth-analyzer.sh b/modules/performance/network-bandwidth-analyzer.sh
index 8683538..3d93698 100755
--- a/modules/performance/network-bandwidth-analyzer.sh
+++ b/modules/performance/network-bandwidth-analyzer.sh
@@ -165,7 +165,8 @@ Total:    $current_month_total" \
     local today_unit=$(echo "$today_total" | awk '{print $2}')
 
     if [ "$today_unit" = "GiB" ] && [ -n "$today_value" ]; then
-        if (( $(echo "$today_value > 50" | bc -l 2>/dev/null || echo 0) )); then
+        local high_usage=$(awk "BEGIN {print ($today_value > 50 ? 1 : 0)}" 2>/dev/null || echo 0)
+        if [ "$high_usage" -eq 1 ]; then
             add_finding "WARNING" "High Daily Bandwidth Usage" \
                 "Today's usage: $today_total
 This is significantly higher than typical usage" \
@@ -234,7 +235,7 @@ analyze_web_traffic() {
             local bytes=$(awk '{sum+=$10} END {print sum}' "$logfile" 2>/dev/null || echo "0")
 
             if [ "$bytes" -gt 0 ]; then
-                local mb=$(echo "scale=2; $bytes / 1048576" | bc 2>/dev/null || echo "0")
+                local mb=$(awk "BEGIN {printf \"%.2f\", $bytes / 1048576}")
                 domain_bandwidth+="  • $(printf '%-40s %10.2f MB' "$domain" "$mb")"$'\n'
             fi
         done
@@ -384,9 +385,10 @@ TX Dropped: $tx_dropped" \
     local tcp_out=$(netstat -s 2>/dev/null | grep "segments sent out" | awk '{print $1}' || echo "1")
 
     if [ "$tcp_out" -gt 1000000 ]; then
-        local retrans_percent=$(echo "scale=2; $tcp_retrans * 100 / $tcp_out" | bc 2>/dev/null || echo "0")
+        local retrans_percent=$(awk "BEGIN {printf \"%.2f\", $tcp_retrans * 100 / $tcp_out}")
+        local retrans_high=$(awk "BEGIN {print ($retrans_percent > 5 ? 1 : 0)}" 2>/dev/null || echo 0)
 
-        if (( $(echo "$retrans_percent > 5" | bc -l 2>/dev/null || echo 0) )); then
+        if [ "$retrans_high" -eq 1 ]; then
             add_finding "WARNING" "High TCP Retransmission Rate" \
                 "Retransmission rate: ${retrans_percent}%
 Segments retransmitted: $tcp_retrans
@@ -410,7 +412,8 @@ Total segments sent: $tcp_out" \
     local ping_result=$(ping -c 5 -W 2 8.8.8.8 2>/dev/null | grep "packet loss" | awk '{print $6}' | tr -d '%')
 
     if [ -n "$ping_result" ]; then
-        if (( $(echo "$ping_result > 5" | bc -l 2>/dev/null || echo 0) )); then
+        local packet_loss_high=$(awk "BEGIN {print ($ping_result > 5 ? 1 : 0)}" 2>/dev/null || echo 0)
+        if [ "$packet_loss_high" -eq 1 ]; then
             add_finding "WARNING" "Packet Loss Detected" \
                 "Packet loss to 8.8.8.8: ${ping_result}%
 This indicates network connectivity issues" \
diff --git a/modules/performance/php-optimizer.sh b/modules/performance/php-optimizer.sh
index 0a5fca5..d870a02 100755
--- a/modules/performance/php-optimizer.sh
+++ b/modules/performance/php-optimizer.sh
@@ -454,9 +454,12 @@ optimize_domain() {
     if [ "$status" = "DISABLED" ]; then
         cecho "${GREEN}2.${NC} ${BOLD}Enable OPcache${NC} for 40-70% performance boost"
         echo ""
-    elif (( $(echo "$hit_rate < 90" | bc -l 2>/dev/null || echo "0") )); then
-        cecho "${GREEN}2.${NC} ${BOLD}Increase opcache.memory_consumption${NC} (current hit rate: ${hit_rate}%)"
-        echo ""
+    else
+        local hit_rate_low=$(awk "BEGIN {print ($hit_rate < 90 ? 1 : 0)}" 2>/dev/null || echo 0)
+        if [ "$hit_rate_low" -eq 1 ]; then
+            cecho "${GREEN}2.${NC} ${BOLD}Increase opcache.memory_consumption${NC} (current hit rate: ${hit_rate}%)"
+            echo ""
+        fi
     fi
 
     echo ""
@@ -650,7 +653,8 @@ view_opcache_stats() {
 
     # Recommendation
     echo ""
-    if (( $(echo "$hit_rate < 90" | bc -l 2>/dev/null || echo "0") )); then
+    local hit_rate_low=$(awk "BEGIN {print ($hit_rate < 90 ? 1 : 0)}" 2>/dev/null || echo 0)
+    if [ "$hit_rate_low" -eq 1 ]; then
         cecho "  ${YELLOW}⚠ Hit rate below 90% - Consider increasing opcache.memory_consumption${NC}"
     else
         cecho "  ${GREEN}✓ Hit rate is excellent${NC}"
diff --git a/tools/toolkit-qa-check.sh b/tools/toolkit-qa-check.sh
index 3b3b154..8cf5acb 100755
--- a/tools/toolkit-qa-check.sh
+++ b/tools/toolkit-qa-check.sh
@@ -71,7 +71,7 @@ while IFS=: read -r file line_num line_content; do
         echo "CRITICAL|$file|$line_num|grep -F with regex anchor"
         count_issue "CRITICAL"
     fi
-done < <(grep -rn 'grep -F' "$TOOLKIT_PATH" --include="*.sh" 2>/dev/null)
+done < <(grep -rn 'grep -F' "$TOOLKIT_PATH" --include="*.sh" --exclude="toolkit-qa-check.sh" 2>/dev/null)
 
 echo ""
 } >> "$REPORT"
@@ -228,9 +228,9 @@ while IFS=: read -r file line_num line_content; do
         echo "LOW|$file|$line_num|Uses bc command"
         count_issue "LOW"
     fi
-done < <(grep -rn ' bc\b' "$TOOLKIT_PATH" --include="*.sh" 2>/dev/null | head -10)
+done < <(grep -rn ' bc\b' "$TOOLKIT_PATH" --include="*.sh" --exclude="toolkit-qa-check.sh" 2>/dev/null | head -10)
 
-total_bc=$(grep -r ' bc\b' "$TOOLKIT_PATH" --include="*.sh" 2>/dev/null | wc -l)
+total_bc=$(grep -r ' bc\b' "$TOOLKIT_PATH" --include="*.sh" --exclude="toolkit-qa-check.sh" 2>/dev/null | wc -l)
 echo "Total found: $total_bc (showing first 10)"
 echo ""
 } >> "$REPORT"
@@ -254,9 +254,9 @@ while IFS=: read -r file line_num line_content; do
             count_issue "MEDIUM"
         fi
     fi
-done < <(grep -rn '/var/cpanel' "$TOOLKIT_PATH" --include="*.sh" 2>/dev/null | head -10)
+done < <(grep -rn '/var/cpanel' "$TOOLKIT_PATH" --include="*.sh" --exclude="toolkit-qa-check.sh" 2>/dev/null | head -10)
 
-total_cpanel=$(grep -r '/var/cpanel' "$TOOLKIT_PATH" --include="*.sh" 2>/dev/null | grep -vE '(\$SYS|:-/var/cpanel)' | grep -v '^[[:space:]]*#' | wc -l)
+total_cpanel=$(grep -r '/var/cpanel' "$TOOLKIT_PATH" --include="*.sh" --exclude="toolkit-qa-check.sh" 2>/dev/null | grep -vE '(\$SYS|:-/var/cpanel)' | grep -v '^[[:space:]]*#' | wc -l)
 echo "Total found: $total_cpanel (showing first 10)"
 echo ""
 } >> "$REPORT"