diff --git a/src/use-cases/task/interfaces/stepable.ts b/src/use-cases/task/interfaces/stepable.ts
index aa4b2ef..2036036 100644
--- a/src/use-cases/task/interfaces/stepable.ts
+++ b/src/use-cases/task/interfaces/stepable.ts
@@ -1,10 +1,8 @@
 export interface Stepable {
   id: string
   title: string
-  estimation?: number
-  steps: Stepable[]
   /**
-   * total estimation in minutes
+   * estimation in minutes
    */
-  totalEstimation: number
+  estimation: number
 }
diff --git a/src/use-cases/task/models/step.test.ts b/src/use-cases/task/models/step.test.ts
deleted file mode 100644
index 3764a11..0000000
--- a/src/use-cases/task/models/step.test.ts
+++ /dev/null
@@ -1,83 +0,0 @@
-import { describe, expect, it } from 'vitest'
-import { Step } from '@/use-cases/task/models/step'
-import { createStepFixture } from '@/use-cases/task/models/step.fixture'
-
-describe('Step', () => {
-  it('adds substeps', () => {
-    const step = createStepFixture()
-
-    step.addSteps(createStepFixture())
-
-    expect(step.steps.length).toEqual(1)
-  })
-
-  it('removes substeps', () => {
-    const step = createStepFixture()
-    step.addSteps(createStepFixture())
-
-    step.removeStep(0)
-
-    expect(step.steps.length).toEqual(0)
-  })
-
-  it('tells the estimation based on the sum of its substeps', () => {
-    const step = createStepFixture()
-      .addSteps(
-        createStepFixture({
-          estimation: 1
-        })
-      )
-      .addSteps(
-        createStepFixture({
-          estimation: 2
-        })
-      )
-      .addSteps(
-        createStepFixture({
-          estimation: 3
-        })
-      )
-
-    expect(step.totalEstimation).toBe(6)
-  })
-
-  it('tells the total estimation if the step estimation is set even with substeps', () => {
-    const step = createStepFixture({
-      estimation: 8
-    })
-      .addSteps(
-        createStepFixture({
-          estimation: 1
-        })
-      )
-      .addSteps(
-        createStepFixture({
-          estimation: 2
-        })
-      )
-
-    expect(step.totalEstimation).toEqual(8)
-  })
-
-  it('flattens the substeps', () => {
-    const leafs = [
-      createStepFixture({
-        id: 'leaf-1'
-      }),
-      createStepFixture({
-        id: 'leaf-2'
-      }),
-      createStepFixture({
-        id: 'leaf-3'
-      })
-    ]
-
-    const step = createStepFixture().addSteps(
-      createStepFixture().addSteps(leafs[0], leafs[1]),
-      createStepFixture().addSteps(createStepFixture().addSteps(leafs[2]))
-    )
-    const steps = Step.getStepLeafs([step])
-
-    expect(steps).toEqual(leafs)
-  })
-})
diff --git a/src/use-cases/task/models/step.ts b/src/use-cases/task/models/step.ts
index 447b99e..09951f9 100644
--- a/src/use-cases/task/models/step.ts
+++ b/src/use-cases/task/models/step.ts
@@ -1,51 +1,17 @@
 import type { Stepable } from '@/use-cases/task/interfaces/stepable'
 
 export class Step implements Stepable {
-  private _steps: Step[] = []
-
   constructor(
     readonly id: string,
     readonly title: string,
-    readonly estimation?: number
+    readonly estimation: number
   ) {
     return this
   }
 
-  public get steps() {
-    return this._steps
-  }
-
-  public addSteps(...steps: Stepable[]) {
-    this._steps.push(...Step.fromStepable(...steps))
-    return this
-  }
-
-  public removeStep(index: number) {
-    if (index < 0 || index >= this._steps.length) {
-      return
-    }
-
-    this._steps.splice(index)
-  }
-
-  public get totalEstimation(): number {
-    return (
-      this.estimation ??
-      this._steps.reduce((acc, step) => acc + step.totalEstimation, 0)
-    )
-  }
-
   public static fromStepable(...stepables: Stepable[]): Step[] {
-    return stepables.map((stepable) =>
-      new Step(stepable.id, stepable.title, stepable.estimation).addSteps(
-        ...Step.fromStepable(...stepable.steps)
-      )
-    )
-  }
-
-  public static getStepLeafs(steps: Stepable[]): Stepable[] {
-    return steps.flatMap((step) =>
-      step.steps.length > 0 ? Step.getStepLeafs(step.steps) : [step]
+    return stepables.map(
+      (stepable) => new Step(stepable.id, stepable.title, stepable.estimation)
     )
   }
 }
diff --git a/src/use-cases/task/models/task.test.ts b/src/use-cases/task/models/task.test.ts
index 06f232b..c887941 100644
--- a/src/use-cases/task/models/task.test.ts
+++ b/src/use-cases/task/models/task.test.ts
@@ -1,6 +1,6 @@
 import type { Taskable } from '@/use-cases/task/interfaces/taskable'
-import { Task } from '@/use-cases/task/models/task'
 import { createStepFixture } from '@/use-cases/task/models/step.fixture'
+import { Task } from '@/use-cases/task/models/task'
 import { faker } from '@faker-js/faker'
 import { describe, expect, it } from 'vitest'
 
@@ -51,4 +51,16 @@ describe('Task', () => {
     task.addSteps(createStepFixture())
     expect(Task.validate(task)).toEqual(true)
   })
+
+  it('calculates the total estimation of steps', () => {
+    const task = new Task(faker.datatype.uuid())
+
+    task.addSteps(
+      createStepFixture({ estimation: 1 }),
+      createStepFixture({ estimation: 2 }),
+      createStepFixture({ estimation: 3 })
+    )
+
+    expect(task.totalEstimation).toEqual(6)
+  })
 })
diff --git a/src/use-cases/task/models/task.ts b/src/use-cases/task/models/task.ts
index 476ead0..13fe993 100644
--- a/src/use-cases/task/models/task.ts
+++ b/src/use-cases/task/models/task.ts
@@ -27,6 +27,10 @@ export class Task implements Taskable {
     return this
   }
 
+  public get totalEstimation() {
+    return this.steps.map((step) => step.estimation).reduce((a, b) => a + b, 0)
+  }
+
   public static fromTaskable(taskable: Taskable) {
     const task = new Task(taskable.id)
     task.title = taskable.title