diff --git a/tests/unit/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCasesTest.php b/tests/unit/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCasesTest.php
index 0a2288db9..709c53ec5 100644
--- a/tests/unit/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCasesTest.php
+++ b/tests/unit/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCasesTest.php
@@ -3,10 +3,12 @@
 namespace Tests\unit\workflow\engine\src\ProcessMaker\BusinessModel\Cases;
 
 use G;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
 use ProcessMaker\BusinessModel\Cases\AbstractCases;
 use ProcessMaker\Model\Application;
 use ProcessMaker\Model\Process;
 use ProcessMaker\Model\ProcessCategory;
+use ProcessMaker\Model\Task;
 use ProcessMaker\Model\User;
 use Tests\TestCase;
 
@@ -15,6 +17,8 @@ use Tests\TestCase;
  */
 class AbstractCasesTest extends TestCase
 {
+    use DatabaseTransactions;
+
     /**
      * This check the getter and setter related to the category
      *
@@ -52,6 +56,22 @@ class AbstractCasesTest extends TestCase
         $this->assertEquals($process->PRO_ID, $actual);
     }
 
+    /**
+     * This check the getter and setter related to the task
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::setTaskId()
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::getTaskId()
+     * @test
+     */
+    public function it_return_set_get_task()
+    {
+        $task = factory(Task::class)->create();
+        $absCases = new AbstractCases();
+        $absCases->setTaskId($task->TAS_ID);
+        $actual = $absCases->getTaskId();
+        $this->assertEquals($task->TAS_ID, $actual);
+    }
+
     /**
      * This check the getter and setter related to the user
      *
@@ -73,6 +93,61 @@ class AbstractCasesTest extends TestCase
         $this->assertEquals($users->USR_ID, $actual);
     }
 
+    /**
+     * This check the getter and setter related to the priority
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::setPriority()
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::getPriority()
+     * @test
+     */
+    public function it_return_set_get_priority()
+    {
+        $absCases = new AbstractCases();
+        $arguments = [1 => 'VL', 2 => 'L', 3 => 'N', 4 => 'H', 5 => 'VH'];
+        $index = array_rand($arguments);
+        $absCases->setPriority($index);
+        $actual = $absCases->getPriority();
+        $this->assertEquals($index, $actual);
+    }
+
+    /**
+     * This check the getter and setter related to the case number
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::setCaseNumber()
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::getCaseNumber()
+     * @test
+     */
+    public function it_return_set_get_case_number()
+    {
+        $case = factory(Application::class)->create();
+        $absCases = new AbstractCases();
+        $absCases->setCaseNumber($case->APP_NUMBER);
+        $actual = $absCases->getCaseNumber();
+        $this->assertEquals($case->APP_NUMBER, $actual);
+    }
+
+    /**
+     * This check the getter and setter related to the range of case number
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::setRangeCaseNumber()
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::getFromCaseNumber()
+     * @covers \ProcessMaker\BusinessModel\Cases\AbstractCases::getToCaseNumber()
+     * @test
+     */
+    public function it_return_set_get_range_case_number()
+    {
+        $case1 = factory(Application::class)->create();
+        $case2 = factory(Application::class)->create([
+            'APP_NUMBER' => $case1->APP_NUMBER + 1
+        ]);
+        $absCases = new AbstractCases();
+        $absCases->setRangeCaseNumber($case1->APP_NUMBER, $case2->APP_NUMBER);
+        $from = $absCases->getFromCaseNumber();
+        $to = $absCases->getToCaseNumber();
+        $this->assertEquals($case1->APP_NUMBER, $from);
+        $this->assertEquals($case2->APP_NUMBER, $to);
+    }
+
     /**
      * This check the getter and setter related to the search
      *
@@ -306,7 +381,12 @@ class AbstractCasesTest extends TestCase
         $properties = [
             'category' => G::generateUniqueID(),
             'process' => G::generateUniqueID(),
+            'task' => rand(),
             'user' => G::generateUniqueID(),
+            'priority' => 1,
+            'caseNumber' => rand(),
+            'caseNumberFrom' => rand(),
+            'caseNumberTo' => rand(),
             'search' => G::generateUniqueID(),
             'caseLink' => G::generateUniqueID(),
             'appUidCheck' => [G::generateUniqueID()],
@@ -323,8 +403,18 @@ class AbstractCasesTest extends TestCase
         $this->assertEquals($properties['category'], $actual);
         $actual = $absCases->getProcessUid();
         $this->assertEquals($properties['process'], $actual);
+        $actual = $absCases->getTaskId();
+        $this->assertEquals($properties['task'], $actual);
         $actual = $absCases->getUserUid();
         $this->assertEquals($properties['user'], $actual);
+        $actual = $absCases->getPriority();
+        $this->assertEquals($properties['priority'], $actual);
+        $actual = $absCases->getCaseNumber();
+        $this->assertEquals($properties['caseNumber'], $actual);
+        $actual = $absCases->getFromCaseNumber();
+        $this->assertEquals($properties['caseNumberFrom'], $actual);
+        $actual = $absCases->getToCaseNumber();
+        $this->assertEquals($properties['caseNumberTo'], $actual);
         $actual = $absCases->getValueToSearch();
         $this->assertEquals($properties['search'], $actual);
         $actual = $absCases->getCaseUid();
diff --git a/tests/unit/workflow/engine/src/ProcessMaker/BusinessModel/Cases/SearchTest.php b/tests/unit/workflow/engine/src/ProcessMaker/BusinessModel/Cases/SearchTest.php
new file mode 100644
index 000000000..cdd3696df
--- /dev/null
+++ b/tests/unit/workflow/engine/src/ProcessMaker/BusinessModel/Cases/SearchTest.php
@@ -0,0 +1,176 @@
+<?php
+
+namespace Tests\unit\workflow\engine\src\ProcessMaker\BusinessModel\Cases;
+
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+use ProcessMaker\BusinessModel\Cases\Search;
+use ProcessMaker\Model\Delegation;
+use Tests\TestCase;
+
+/**
+ * Class InboxTest
+ *
+ * @coversDefaultClass \ProcessMaker\BusinessModel\Cases\Search
+ */
+class SearchTest extends TestCase
+{
+    use DatabaseTransactions;
+
+    /**
+     * Set up function.
+     */
+    public function setUp()
+    {
+        parent::setUp();
+        Delegation::truncate();
+    }
+
+    /**
+     * Create participated cases factories
+     *
+     * @param int
+     *
+     * @return array
+     */
+    public function createSearch($rows = 10)
+    {
+        $delegation = factory(Delegation::class, $rows)->states('foreign_keys')->create();
+
+        return $delegation;
+    }
+
+    /**
+     * It tests the getData method without filters
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\Search::getData()
+     * @test
+     */
+    public function it_should_test_get_data_method_without_filters()
+    {
+        // Create factories related to the delegation cases
+        $cases = $this->createSearch();
+        // Create new Search object
+        $search = new Search();
+        $result = $search->getData();
+        // This assert that the expected numbers of results are returned
+        $this->assertEquals(count($cases), count($result));
+    }
+
+    /**
+     * It tests the getData with case number
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\Search::getData()
+     * @test
+     */
+    public function it_should_test_get_data_method_with_specific_case_number()
+    {
+        // Create factories related to the delegation cases
+        $cases = $this->createSearch();
+        // Create new Search object
+        $search = new Search();
+        $search->setCaseNumber($cases[0]->APP_NUMBER);
+        // Set order by column value
+        $search->setOrderByColumn('APP_DELEGATION.APP_NUMBER');
+        $result = $search->getData();
+        // This assert that the expected numbers of results are returned
+        $this->assertEquals($cases[0]->APP_NUMBER, $result[0]['APP_NUMBER']);
+    }
+
+    /**
+     * It tests the getData with priority
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\Search::getData()
+     * @test
+     */
+    public function it_should_test_get_data_method_with_specific_priority()
+    {
+        // Create factories related to the delegation cases
+        $cases = $this->createSearch();
+        // Create new Search object
+        $search = new Search();
+        $search->setPriority(3);
+        // Set order by column value
+        $search->setOrderByColumn('APP_DELEGATION.APP_NUMBER');
+        $result = $search->getData();
+        // This assert that the expected numbers of results are returned
+        $this->assertEquals(3, $result[0]['DEL_PRIORITY']);
+    }
+
+    /**
+     * It tests the getData with process
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\Search::getData()
+     * @test
+     */
+    public function it_should_test_get_data_method_with_specific_process()
+    {
+        // Create factories related to the delegation cases
+        $cases = $this->createSearch();
+        // Create new Search object
+        $search = new Search();
+        $search->setProcessId($cases[0]->PRO_ID);
+        // Set order by column value
+        $search->setOrderByColumn('APP_DELEGATION.APP_NUMBER');
+        $result = $search->getData();
+        // This assert that the expected numbers of results are returned
+        $this->assertEquals($cases[0]->PRO_ID, $result[0]['PRO_ID']);
+    }
+
+    /**
+     * It tests the getData with task
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\Search::getData()
+     * @test
+     */
+    public function it_should_test_get_data_method_with_specific_task()
+    {
+        // Create factories related to the delegation cases
+        $cases = $this->createSearch();
+        // Create new Search object
+        $search = new Search();
+        $search->setTaskId($cases[0]->TAS_ID);
+        // Set order by column value
+        $search->setOrderByColumn('APP_DELEGATION.APP_NUMBER');
+        $result = $search->getData();
+        // This assert that the expected numbers of results are returned
+        $this->assertEquals($cases[0]->TAS_ID, $result[0]['TAS_ID']);
+    }
+
+    /**
+     * It tests the getData with user
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\Search::getData()
+     * @test
+     */
+    public function it_should_test_get_data_method_with_specific_user()
+    {
+        // Create factories related to the delegation cases
+        $cases = $this->createSearch();
+        // Create new Search object
+        $search = new Search();
+        $search->setUserId($cases[0]->USR_ID);
+        // Set order by column value
+        $search->setOrderByColumn('APP_DELEGATION.APP_NUMBER');
+        $result = $search->getData();
+        // This assert that the expected numbers of results are returned
+        $this->assertEquals($cases[0]->USR_ID, $result[0]['USR_ID']);
+    }
+
+    /**
+     * It tests the getCounter method
+     *
+     * @covers \ProcessMaker\BusinessModel\Cases\Search::getCounter()
+     * @test
+     */
+    public function it_should_test_the_counter_for_search()
+    {
+        // Create factories related to the delegation cases
+        $cases = $this->createSearch();
+        // Create new Search object
+        $search = new Search();
+        // Set order by column value
+        $search->setOrderByColumn('APP_DELEGATION.APP_NUMBER');
+        $total = $search->getCounter();
+        $this->assertEquals(count($cases), $total);;
+    }
+}
\ No newline at end of file
diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCases.php b/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCases.php
index 0fb8ab5ca..fbc7cc186 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCases.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Cases/AbstractCases.php
@@ -16,6 +16,7 @@ class AbstractCases implements CasesInterface
     const ORDER_DIRECTIONS = ['DESC', 'ASC'];
     const CORRECT_CANCELED_STATUS = 'CANCELED';
     const INCORRECT_CANCELED_STATUS = 'CANCELLED';
+    const PRIORITIES = [1 => 'VL', 2 => 'L', 3 => 'N', 4 => 'H', 5 => 'VH'];
 
     // Filter by category from a process, know as "$category" in the old lists classes
     private $categoryUid = '';
@@ -26,6 +27,9 @@ class AbstractCases implements CasesInterface
     // Filter by process using the Id field
     private $processId = 0;
 
+    // Filter by task using the Id field
+    private $taskId = 0;
+
     // Filter by user, know as "$user" in the old lists classes
     private $userUid = '';
 
@@ -44,6 +48,9 @@ class AbstractCases implements CasesInterface
     // Filter by risk status, know as "$filterStatus" in the old list "inbox" class
     private $riskStatus = '';
 
+    // Filter by specific priority
+    private $priority = 0;
+
     // Filter by case status, know as "$filterStatus" in the old "participated last" class
     private $caseStatus = '';
 
@@ -53,6 +60,10 @@ class AbstractCases implements CasesInterface
     // Filter by a specific case using case number
     private $caseNumber = 0;
 
+    // Filter by a specific range of case number
+    private $fromCaseNumber = 0;
+    private $toCaseNumber = 0;
+
     // Filter by specific cases, know as "$appUidCheck" in the old lists classes
     private $casesUids = [];
 
@@ -140,6 +151,26 @@ class AbstractCases implements CasesInterface
         return $this->processId;
     }
 
+    /**
+     * Set task Id value
+     *
+     * @param int $taskId
+     */
+    public function setTaskId(int $taskId)
+    {
+        $this->taskId = $taskId;
+    }
+
+    /**
+     * Get task Id value
+     *
+     * @return int
+     */
+    public function getTaskId()
+    {
+        return $this->taskId;
+    }
+
     /**
      * Set User Uid value
      *
@@ -296,7 +327,7 @@ class AbstractCases implements CasesInterface
     }
 
     /**
-     * Get risk status
+     * Get risk value
      *
      * @return string
      */
@@ -305,6 +336,40 @@ class AbstractCases implements CasesInterface
         return $this->riskStatus;
     }
 
+    /**
+     * Set priority value
+     *
+     * @param int $priority
+     *
+     * @throws Exception
+     */
+    public function setPriority(int $priority)
+    {
+        // Validate the priority value
+        if (!empty($priority)) {
+            if (!empty(self::PRIORITIES[$priority])) {
+                $priorityCode = $priority;
+            } else {
+                throw new Exception("Priority value {$priority} is not valid.");
+            }
+        } else {
+            // List all priorities
+            $priorityCode = 0;
+        }
+
+        $this->priority = $priorityCode;
+    }
+
+    /**
+     * Get priority status
+     *
+     * @return string
+     */
+    public function getPriority()
+    {
+        return $this->priority;
+    }
+
     /**
      * Set Case status
      *
@@ -385,6 +450,38 @@ class AbstractCases implements CasesInterface
         return $this->caseNumber;
     }
 
+    /**
+     * Set range of Case Number
+     *
+     * @param int $from
+     * @param int $to
+     */
+    public function setRangeCaseNumber(int $from, int $to)
+    {
+        $this->fromCaseNumber = $from;
+        $this->toCaseNumber = $to;
+    }
+
+    /**
+     * Get from Case Number
+     *
+     * @return int
+     */
+    public function getFromCaseNumber()
+    {
+        return $this->fromCaseNumber;
+    }
+
+    /**
+     * Get to Case Number
+     *
+     * @return int
+     */
+    public function getToCaseNumber()
+    {
+        return $this->toCaseNumber;
+    }
+
     /**
      * Set Cases Uids
      *
@@ -603,10 +700,26 @@ class AbstractCases implements CasesInterface
             $this->setProcessUid($properties['process']);
         }
 
+        if (!empty($properties['task'])) {
+            $this->setTaskId($properties['task']);
+        }
+
         if (!empty($properties['user'])) {
             $this->setUserUid($properties['user']);
         }
 
+        if (!empty($properties['priority'])) {
+            $this->setPriority($properties['priority']);
+        }
+
+        if (!empty($properties['caseNumber'])) {
+            $this->setCaseNumber($properties['caseNumber']);
+        }
+
+        if (!empty($properties['caseNumberFrom']) && !empty($properties['caseNumberTo'])) {
+            $this->setRangeCaseNumber($properties['caseNumberFrom'], $properties['caseNumberTo']);
+        }
+
         if (!empty($properties['search'])) {
             $this->setValueToSearch($properties['search']);
         }
diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Cases/Search.php b/workflow/engine/src/ProcessMaker/BusinessModel/Cases/Search.php
new file mode 100644
index 000000000..594701aad
--- /dev/null
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Cases/Search.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace ProcessMaker\BusinessModel\Cases;
+
+use ProcessMaker\Model\Delegation;
+
+class Search extends AbstractCases
+{
+    /**
+     * Get the data corresponding to advanced search
+     *
+     * @return array
+     */
+    public function getData()
+    {
+        $query = Delegation::query()->select();
+
+        // Filter by case number
+        $query->case($this->getCaseNumber());
+
+        // Filter by case number: from and to
+        if ($this->getFromCaseNumber() > 0 && $this->getToCaseNumber() > 0) {
+            $query->rangeOfCases($this->getFromCaseNumber(), $this->getToCaseNumber());
+        }
+
+        // @todo: Filter by case title, pending from other PRD
+
+        // Filter by category
+        $query->categoryProcess($this->getCategoryUid());
+
+        // Filter by priority
+        if ($this->getPriority() > 0) {
+            $query->priority($this->getPriority());
+        }
+
+        // Filter by process
+        if (!empty($this->getProcessId())) {
+            $query->processId($this->getProcessId());
+        }
+
+        // Filter by user
+        if (!empty($this->getUserId())) {
+            $query->userId($this->getUserId());
+        }
+
+        // Filter by task
+        if (!empty($this->getTaskId())) {
+            $query->task($this->getTaskId());
+        }
+
+        // The order by clause
+        $query->orderBy($this->getOrderByColumn(), $this->getOrderDirection());
+
+        // The limit by clause
+        $query->offset($this->getOffset())->limit($this->getLimit());
+
+        //Execute the query
+        $results = $query->get();
+
+        //Return the values as an array format
+        return $results->values()->toArray();
+    }
+
+    /**
+     * Get the number of rows corresponding to the advanced search
+     *
+     * @return int
+     */
+    public function getCounter()
+    {
+        $query = Delegation::query()->select();
+
+        // Return the number of rows
+        return $query->count();
+    }
+}
\ No newline at end of file
diff --git a/workflow/engine/src/ProcessMaker/Model/Delegation.php b/workflow/engine/src/ProcessMaker/Model/Delegation.php
index f9b823e63..d7187b802 100644
--- a/workflow/engine/src/ProcessMaker/Model/Delegation.php
+++ b/workflow/engine/src/ProcessMaker/Model/Delegation.php
@@ -54,6 +54,18 @@ class Delegation extends Model
         return $this->belongsTo(Process::class, 'PRO_ID', 'PRO_ID');
     }
 
+    /**
+     * Scope a query to only include specific priority
+     *
+     * @param  \Illuminate\Database\Eloquent\Builder $query
+     * @param  int $priority
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopePriority($query, int $priority)
+    {
+        return $query->where('DEL_PRIORITY', $priority);
+    }
+
     /**
      * Scope a query to only include open threads
      *
@@ -73,7 +85,7 @@ class Delegation extends Model
      *
      * @return \Illuminate\Database\Eloquent\Builder
      */
-    public function scopeIndex($query, $index)
+    public function scopeIndex($query, int $index)
     {
         return $query->where('DEL_INDEX', '=', $index);
     }
@@ -177,6 +189,21 @@ class Delegation extends Model
         return $query->where('APP_DELEGATION.APP_NUMBER', '=', $appNumber);
     }
 
+    /**
+     * Scope a query to only include cases from a range
+     *
+     * @param  \Illuminate\Database\Eloquent\Builder $query
+     * @param  int $from
+     * @param  int $to
+     *
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeRangeOfCases($query, int $from, int $to)
+    {
+        return $query->where('APP_DELEGATION.APP_NUMBER', '>=', $from)
+            ->where('APP_DELEGATION.APP_NUMBER', '<=', $to);
+    }
+
     /**
      * Scope a query to only include specific cases
      *
@@ -305,7 +332,7 @@ class Delegation extends Model
      *
      * @return \Illuminate\Database\Eloquent\Builder
      */
-    public function scopeTask($query, $task)
+    public function scopeTask($query, int $task)
     {
         return $query->where('APP_DELEGATION.TAS_ID', '=', $task);
     }
@@ -1273,37 +1300,4 @@ class Delegation extends Model
 
         return $thread;
     }
-
-    /**
-     * Helper to get the priority code from a given value
-     *
-     * @param int $priorityValue
-     *
-     * @return string
-     *
-     * @throws Exception
-     */
-    public static function getPriorityCode($priorityValue)
-    {
-        if (!empty(self::PRIORITIES_MAP[$priorityValue])) {
-            $priorityCode = self::PRIORITIES_MAP[$priorityValue];
-        } else {
-            throw new Exception("Priority value {$priorityValue} is not valid.");
-        }
-        return $priorityCode;
-    }
-
-    /**
-     * Helper to get the priority label from a given value
-     *
-     * @param int $priorityValue
-     *
-     * @return string
-     */
-    public static function getPriorityLabel($priorityValue)
-    {
-        $priorityCode = self::getPriorityCode($priorityValue);
-
-        return G::LoadTranslation("ID_PRIORITY_{$priorityCode}");
-    }
 }