ビルダー パターンは複雑なオブジェクト構築の課題をどのように解決しますか?

public class PizzaBuilder {
    private int size;
    private boolean cheese;
    private boolean pepperoni;
    private boolean bacon;

    public PizzaBuilder(int size) { this.size = size; }
    public PizzaBuilder cheese(boolean value) { cheese = value; return this; }
    public PizzaBuilder pepperoni(boolean value) { pepperoni = value; return this; }
    public PizzaBuilder bacon(boolean value) { bacon = value; return this; }
    public Pizza build() { return new Pizza(this); }
}

public class Pizza {
    private final int size;
    private final boolean cheese;
    private final boolean pepperoni;
    private final boolean bacon;

    private Pizza(PizzaBuilder builder) {
        this.size = builder.size;
        this.cheese = builder.cheese;
        this.pepperoni = builder.pepperoni;
        this.bacon = builder.bacon;
    }
}

Pizza pizza = new PizzaBuilder(12)
                    .cheese(true)
                    .pepperoni(true)
                    .bacon(true)
                    .build();